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function18.com website review
Visit site (opens in a new tab)Reviewed 9 November 202639 issues · 108 checks
This review found 39 issues worth fixing on function18.com, 14 of them high impact, across 108 checks. The most urgent: page weight: 34.6 MB in 540 requests. Your full playbook turns these into prioritised fixes alongside reviews, competitors and channels.
- Homepage
- Phone render
- Links and pages
- Google PageSpeed
Google PageSpeed Insights (opens in a new tab), mobile
Site score
76C- #48,913 of 81,594 reviewed websitesbeats 35%
- #27,792 of 40,426 online storesbeats 27%
- #25,894 of 35,809 Shopify storesbeats 23%
Closest competitors among Shopify stores
Compare side by sideShow as table
| Date | Real-visitor load time (LCP) |
|---|---|
| May 23, 2026 | 1.6 s |
| May 30, 2026 | 1.6 s |
| Jun 6, 2026 | 1.6 s |
| Jun 13, 2026 | 1.6 s |
| Jun 20, 2026 | 1.6 s |
| Jun 27, 2026 | 1.7 s |
| Jul 4, 2026 | 1.7 s |
| Jul 11, 2026 | 1.7 s |
| Jul 18, 2026 | 1.6 s |
| Jul 25, 2026 | 1.6 s |
| Aug 1, 2026 | 1.6 s |
| Aug 8, 2026 | 1.6 s |
| Aug 15, 2026 | 1.6 s |
| Aug 22, 2026 | 1.6 s |
| Aug 29, 2026 | 1.7 s |
| Sep 5, 2026 | 1.7 s |
| Sep 12, 2026 | 1.7 s |
| Sep 19, 2026 | 1.7 s |
| Sep 26, 2026 | 1.7 s |
| Oct 3, 2026 | 1.7 s |
| Oct 10, 2026 | 1.7 s |
| Oct 17, 2026 | 1.7 s |
| Oct 24, 2026 | 1.7 s |
| Oct 31, 2026 | 1.7 s |
| Nov 7, 2026 | 1.6 s |
Show as table
| Date | Real-visitor tap response (INP) |
|---|---|
| May 23, 2026 | 120 ms |
| May 30, 2026 | 123 ms |
| Jun 6, 2026 | 129 ms |
| Jun 13, 2026 | 134 ms |
| Jun 20, 2026 | 136 ms |
| Jun 27, 2026 | 139 ms |
| Jul 4, 2026 | 143 ms |
| Jul 11, 2026 | 144 ms |
| Jul 18, 2026 | 141 ms |
| Jul 25, 2026 | 138 ms |
| Aug 1, 2026 | 138 ms |
| Aug 8, 2026 | 137 ms |
| Aug 15, 2026 | 138 ms |
| Aug 22, 2026 | 138 ms |
| Aug 29, 2026 | 138 ms |
| Sep 5, 2026 | 139 ms |
| Sep 12, 2026 | 139 ms |
| Sep 19, 2026 | 141 ms |
| Sep 26, 2026 | 140 ms |
| Oct 3, 2026 | 139 ms |
| Oct 10, 2026 | 139 ms |
| Oct 17, 2026 | 138 ms |
| Oct 24, 2026 | 146 ms |
| Oct 31, 2026 | 154 ms |
| Nov 7, 2026 | 162 ms |
Chrome UX Report (opens in a new tab): real Chrome visitors over rolling 28-day periods.
One score from every part of this review. How it works
How it loaded on a phone
1.3 s
2.5 s
3.8 s
5.1 s
6.4 s
7.6 s
8.9 s
10.2 s
function18.com does not allow embedding, so this is Google's rendering of the page.
Speed
Google Tag Manager adds 1.7 s
1.7 sGoogle Tag Manager costs a phone 1.7 s of main-thread work and 1.4 MB of downloads while your page loads. That alone is enough to make taps feel slow. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.
Render-blocking requests
1.6 s12 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.6 s.
Main-thread work: 11.2 s
A phone's processor spends 11.2 s on main-thread work while loading, 6.1 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.
Signyfyd adds 1.0 s
1.0 sSignyfyd costs a phone 1.0 s of main-thread work and 264 KiB of downloads while your page loads. That alone is enough to make taps feel slow. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.
Mobile performance score: 37
37/100Your mobile performance score is 37. Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.
4,108 HTML elements
The page has 4,108 HTML elements. Above 1,500, rendering and every interaction get slower on phones.
8 third-party services on the page
8 third-party services load with your homepage (Google Tag Manager, Signyfyd and Shopify and others), adding 3.6 MB and 3.9 s of main-thread time.
Reduce unused JavaScript
300 ms · 1.2 MBAbout 1.2 MB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 300 ms faster on a phone.
Use efficient cache lifetimes
950 ms · 400 KiB29 files are served with short cache lifetimes, so returning visitors download them again (400 KiB).
Improve image delivery
616 KiB43 images could be 616 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.
Shopify adds 349 ms
349 msShopify costs a phone 349 ms of main-thread work and 1,019 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.
20 long tasks on the main thread
20 long tasks block the main thread while loading, the longest for 427 ms. During a long task the page ignores taps.
Klevu Search adds 331 ms
331 msKlevu Search costs a phone 331 ms of main-thread work and 163 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.
LoyaltyLion adds 83 ms
83 msLoyaltyLion costs a phone 83 ms of main-thread work and 324 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.
Legacy JavaScript
150 ms · 68 KiBPolyfills for old browsers add 68 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 150 ms faster on a phone.
Reduce unused CSS
150 ms · 59 KiBAbout 59 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 150 ms faster on a phone.
Font display
50 msWeb fonts hide text while they load. Setting font-display: swap shows text immediately (about 50 ms).
Duplicated JavaScript
17 KiB17 KiB JavaScript is shipped twice across bundles.
Minify JavaScript
14 KiB14 KiB could be saved by minifying JavaScript.
Chained critical requests
Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.
Forced reflow
Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.
1 checks passed
Server response: 16 ms
16 msYour server sent the HTML in 16 ms, well inside Google's 600 ms guideline.
Core Web Vitals
Fails Core Web Vitals for real visitors
Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.
Time to Interactive: 36.3 s
36.3 sThe page becomes fully interactive after 36.3 s. Good is under 3.8 s.
Total Blocking Time: 2.1 s
2.1 sScripts block taps and scrolling for 2.1 s in total while the page loads. Good is under 200 ms.
Largest Contentful Paint: 6.5 s
6.5 sYour largest element takes 6.5 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the element shown below.
Speed Index: 9.0 s
9.0 sVisually, the page fills in at 9.0 s (Speed Index). Good is under 3.4 s.
Real-user LCP: 2.6 s
2.6 sReal visitors wait 2.6 s for the largest content to appear (75th percentile). Good is under 2.5 s.
Tap response (INP) got 30% slower for real visitors
+30%Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' tap response (inp) went from 120 ms to 162 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).
Real-user FCP: 2.4 s
2.4 sReal visitors see the first content after 2.4 s (75th percentile). Good is under 1.8 s.
Real-user TTFB: 873 ms
873 msReal visitors wait 873 ms for your server to start answering (75th percentile). Good is under 800 ms.
First Contentful Paint: 2.7 s
2.7 sThe first text or image appears after 2.7 s on a phone. Good is under 1.8 s.
Largest content (LCP) held steady for real visitors
+3%Over the last 25 four-week periods to 2026-11-07, real Chrome visitors' largest content (lcp) went from 1.6 s to 1.6 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).
3 checks passed
Real-user INP: 145 ms
145 msReal visitors wait 145 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.
Real-user CLS: 0.01
0.01For real visitors the layout shifts by 0.01 (75th percentile). Good is under 0.1.
Cumulative Layout Shift: 0.038
0.038The layout barely moves while loading (CLS 0.038, good is under 0.1).
Images and page weight
Page weight: 34.6 MB in 540 requests
34.6 MBYour homepage downloads 34.6 MB in 540 requests on a phone: media 28.0 MB (4), scripts 3.1 MB (122) and other files 1.4 MB (314). Under 2 MB keeps phones on slow connections fast.
5 images in older formats
5 images (392 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.
10 images below the first screen load straight away
10 images further down the page (249 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.
About 9.8 g of CO₂ per visit
9.80 gBy the Sustainable Web Design model, a visit to your homepage emits about 9.80 g of CO₂e: 1176.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.
1 checks passed
Images are sized for phones
No image is downloaded at more than three times the size it is drawn on a phone.
Accessibility
10 text elements with low contrast
10 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.
15 images without alt text
15 images have no alt text, which hurts accessibility and image search.
All page content should be contained by landmarks (2 elements)
All page content should be contained by landmarks: 2 elements on the page fail this check, rated moderate by axe-core.
2 links without text
2 visible links have no text or label, so screen readers cannot say where they go.
Headings skip levels
Headings skip levels (h1 → h3), which makes the page harder to scan with a screen reader.
1 checks passed
48 automated accessibility rules passed
axe-core 4.13.0, the open-source engine behind most accessibility testing tools, ran 53 WCAG 2.2 A/AA and best-practice rules on the phone render: 48 passed and 5 failed. 4 mores need a person to judge. Automated rules catch about a third of accessibility problems; the rest need manual testing.
SEO
2 H1 headlines
There are 2 <h1> headlines (“Introducing Maejer Golf | For The Moments That Ma…” and “FUNCTION 18 GOLF CLOTHING”). One clear main headline is easier for people and search engines.
1 link with vague text
1 link use generic text like “click here” or “learn more”, which tells Google nothing about the page behind it.
320 internal links, 7 external
The homepage links to 320 pages on function18.com and 7 external pages.
7 checks passed
Meta description: 149 characters
Your meta description is 149 characters: “Buy Mens Golf Clothing From The Leading Brands - Free Express UK Delivery - Function18 Stock A Huge Range Of Golf Shirt…”.
Title: 64 characters
Your title is a healthy 64 characters: “Mens Golf Clothing Store | Shirts, Trousers & Shoes | Function18”.
Canonical URL set
The canonical URL is https://www.function18.com/.
Structured data in place
Structured data found: Organization and WebSite.
Open Graph tags complete
Open Graph tags are complete, so shared links show a title, description and image.
robots.txt in place
robots.txt is in place and points crawlers to your sitemap.
XML sitemap found
Your XML sitemap is reachable at https://www.function18.com/sitemap.xml.
AI search readiness
4 checks passed
AI answer engines may read the site
Your robots.txt lets the crawlers behind ChatGPT search, Claude and Perplexity read the site and cite it in answers.
Organization data: 4 of 6 facts
Your Organization JSON-LD gives name, url, logo and sameAs (social profiles); description and contact details would complete it.
Text is in the HTML
Your server sends the page's text in the HTML (1,185 words), so crawlers that don't run JavaScript still read it.
llms.txt published
The site publishes /llms.txt (6 KiB, 8 links), a plain-text guide to the site for AI tools.
Other pages
2 pages without an H1
/pages/rewards and /collections/all-products have no <h1> headline, so visitors and search engines get no clear main topic.
15 internal pages checked
We fetched 15 pages linked from your homepage (of 142 found) and read each the way a search engine does.
6 checks passed
Linked pages load
All 15 pages we checked loaded without an error.
Canonical URLs point to themselves
No page we checked hands its ranking to a different URL.
Every page has a meta description
All 15 pages that loaded have a meta description.
Titles are unique
Every page we checked has its own title.
No linked page is hidden from search
None of the pages we checked carries a noindex tag.
Every page has a title
All 15 pages that loaded have a <title>.
Best practices
6 JavaScript errors while loading
6 errors were logged to the browser console while the page loaded, for example “Cannot call lion.init more than once”.
2 checks passed
Tap targets are thumb-sized
66 of 76 tappable elements near the top are at least 24 px.
Mobile viewport set
The page declares a mobile viewport.
Security and trust
1 broken external link
1 link to other sites is dead, for example https://x81qxa896bwtnvn4-26480607341.shopifypreview.com/blogs/journal/articles?preview_key=7fd36b8debeb428a3a5abee85269047b (404).
Short HSTS lifetime
HSTS is set, but max-age is 91 days; one year is the recommended minimum.
No Referrer-Policy
No Referrer-Policy header, so full URLs can leak to the sites you link to.
No Permissions-Policy
No Permissions-Policy header to switch off camera, microphone and location for embedded content.
Deprecated X-XSS-Protection
X-XSS-Protection is set to “1; mode=block”; the header is deprecated and can introduce bugs. Use 0 or remove it.
No security.txt
There is no /.well-known/security.txt telling researchers how to report a security problem to you.
6 checks passed
Served over HTTPS
The homepage is served over HTTPS (function18.com).
Valid certificate (47 days left)
The certificate from Let's Encrypt · YE2 verifies for function18.com and is valid for another 47 days.
Protected from clickjacking
X-Frame-Options or a frame-ancestors policy stops other sites framing yours.
Content-Security-Policy set
A Content-Security-Policy is set, the main browser-side defence against injected scripts.
http:// redirects to https
http://function18.com redirects to the secure version.
HTTP/2 and HTTP/3
The server speaks HTTP/2 and advertises HTTP/3, so browsers load many files over one connection.
Domain and trust
DNSSEC is off
function18.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.
3 checks passed
Domain is 20 years old
20 yearsfunction18.com was registered in Oct 2006 through Easyspace Limited. An established domain carries more trust with email providers and search engines.
Certificate issuers are restricted
CAA records allow only globalsign.com, letsencrypt.org, pki.goog and ssl.com to issue certificates for function18.com, so a mis-issued certificate from anyone else is refused.
Registered until Oct 2036
function18.com is registered until Oct 2036.
Content and conversion
Local business without LocalBusiness data
Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.
No phone number on the homepage
A local customer looking to call finds no phone number on the homepage. Add one, ideally as a tap-to-call link.
Thin social proof
Social proof on the homepage: 1 trust badge. Pairing it with named testimonials or customer logos makes it far more convincing.
No analytics detected
No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.
No direct contact details
No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.
No opening hours
The homepage shows no opening hours. If customers visit or call, show when.
No map or directions link
There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.
No risk reducer
No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.
About 797 words of copy
The homepage carries about 797 words of visible text.
3 checks passed
Clear next step on the first screen
On a phone, the first screen shows a clear next step: “SHOP NOW” and “Login / Sign Up”.
10 calls to action
The homepage has 10 calls to action, for example “Login / Sign Up”, “SHOP NOW” and “Contact Us”.
2 short forms
2 short forms (1 field at most) are right on the homepage.
Email authentication
Email authentication score: 95/100
Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.
3 checks passed
DMARC policy: reject
DMARC tells receivers to reject mail that fails authentication.
SPF in place (~all)
An SPF record lists your sending servers and marks other mail as suspicious (~all): “v=spf1 include:_spf.google.com include:mailgun.org include:shops.shopify.com ~all”.
DKIM signing found
A DKIM key is published (selector “google” and “k1”), so receivers can verify mail really came from you.
Privacy and tracking
5 trackers load before any consent
5Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Klaviyo and Meta Pixel (measured from a US location before any click). A consent tool (OneTrust) is installed; check it blocks these until visitors agree where the law requires it.
12 cookies set on arrival
12Opening the homepage sets 12 cookies (measured from a US location before any click).
51 other companies contacted
Loading the homepage contacts 51 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.
1 checks passed
Consent tool: OneTrust
A consent management tool (OneTrust) loads with the page.
Apps on your store
Your storefront loads 14 apps. Each one is code from another company running for your shoppers.
None of the apps your storefront loads is on the list of apps with a known security problem.
Apps your storefront loads
Onetrust Consent Management · Instant Ai Page Builder · Profitmetrics · Elevar Conversion Tracking · Loyalty Rewards And Referrals · Klaviyo Email Marketing Sms · Orbe Geolocation · Upcharge Fees · Freegifts · klevu.com · bogos.io · signifyd.com · salesfire.co.uk · amazonaws.com
Apps found in the homepage's code. Apps that only run in checkout or the admin aren't seen, and a headless storefront shows none. App data from programmable.info
Upkeep, stack and company
Stack
- E-commerce
- Shopify
- Hosting
- Shopify
Company
- Headquarters
- Manchester
Upkeep, stack, hiring and company data from programmable.info
Go beyond the website
What your $25 Growth Playbook adds
This review found 39 issues on function18.com, including 24 speed issues, 2 SEO issues and 5 conversion gaps. That is the website alone. The full Growth Playbook pairs these findings with what your customers say in public reviews and communities and what your closest competitors do better, then turns everything into at least 20 prioritised ideas, each with the evidence behind it, a step-by-step playbook, a metric and an owner.
- 28 research agents read your site, reviews, competitors, communities and public filings
- Customer review mining (G2, Capterra, Trustpilot and more) and voice-of-pain analysis in your buyers’ own words
- Competitor intelligence with battlecards for your closest rivals
- Ideal customer profile, buyer segments and buying-stage funnel
- Ranked channels, outreach sequences and content angles
- Live Reddit threads where buyers ask for what you sell, with draft replies
- Earned media and PR openings
- At least 20 ideas with evidence, a step-by-step playbook, metric, owner, effort and impact, grouped into this week, this quarter, big bets and wildcards, plus a 30/60/90-day roadmap
- PDF, Markdown, CSV, Notion and Linear exports, and a shareable page your team can track progress on
- Refresh the playbook later to see what changed
14-day money-back guarantee: not happy for any reason, email us within 14 days and we refund in full.