serenium.it website review

5 images could be 783 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

4 files block the first paint until they finish downloading. Deferring or inlining them could save about 750 ms.

6 third-party services load with your homepage (JSDelivr CDN, parcelwill.com and Shopify and others), adding 263 KiB and 1 ms of main-thread time.

About 24 KiB of CSS is downloaded but never applied on this page.

8 files are served with short cache lifetimes, so returning visitors download them again (17 KiB).

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

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.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 1.2 s to 2.1 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Real visitors see the first content after 1.8 s (75th percentile). Good is under 1.8 s.

The first text or image appears after 1.9 s on a phone. Good is under 1.8 s.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 171 ms to 188 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

6_2_1e4c1d4c-b62a-4361-a6fd-afac5446add7.webp is on the first screen but marked loading="lazy", so the browser waits before fetching it and the page looks finished later. Load it eagerly (and give it fetchpriority="high" if it is the main image).

1 image (86 KiB) is 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.

By the Sustainable Web Design model, a visit to your homepage emits about 0.49 g of CO₂e: 59.3 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

2 buttons have no accessible name, so screen readers announce just “button”.

ARIA attributes must conform to valid values: 1 element on the page fails this check, rated critical by axe-core.

16 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

Elements must only use permitted ARIA attributes: 6 elements on the page fail this check, rated serious by axe-core.

The viewport tag blocks pinch-zoom, which low-vision visitors rely on.

All page content should be contained by landmarks: 1 element on the page fails this check, rated moderate by axe-core.

Alternative text of images should not be repeated as text: 1 element on the page fails this check, rated minor by axe-core.

No meta description, so Google writes its own snippet from whatever text it finds.

Your title is only 8 characters: “SERENIUM”. Between 30 and 65 characters leaves room to say what you do and for whom.

There are 2 <h1> headlines (“Serenium Italia” and “Il sollievo che il tuo corpo ti sta chiedendo”). One clear main headline is easier for people and search engines.

No Open Graph image (also missing: og:description), so links shared on LinkedIn, Slack or Facebook show no preview picture.

The homepage links to 43 pages on serenium.it and 4 external pages.

Your Organization JSON-LD is missing logo, sameAs (social profiles), description and contact details. These are the facts AI assistants use to describe a business and to tell it apart from others with a similar name.

There is no https://serenium.it/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

https://serenium.it/collections/specific-products and https://serenium.it/collections/sale have no meta description, so Google writes the search snippet from whatever text it finds.

https://serenium.it/collections/specific-products and https://serenium.it/collections/sale have no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 16 found) and read each the way a search engine does.

8 of 28 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

We found no call-to-action buttons or links (such as “Book a demo” or “Get a quote”) anywhere on the homepage.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 505 words of visible text.

The page uses urgency cues (a countdown or limited-time wording).

Before a visitor clicks anything, the page loads Klaviyo (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 11 cookies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 8 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.