What are Core Web Vitals and why are they important for SEO?

Core Web Vitals is a set of three key metrics from Google that evaluate real user experience: 1) LCP (Largest Contentful Paint) — page main visual content loading speed (norm — less than 2.5 seconds); 2) CLS (Cumulative Layout Shift) — layout stability, absence of sudden block shifts during loading (norm — less than 0.1); 3) INP (Interaction to Next Paint) — interface response delay on user click. If a website does not fall into the green zones of these metrics, Google penalizes its search rankings.

Is it possible to speed up an old 1C-Bitrix or WordPress website?

Yes, we speed up websites on any CMS. On WordPress, we disable unused plugin styles, configure Redis object cache, and optimize heavy SQL queries. On 1C-Bitrix, we configure Composite Website technology, optimize component autocaching, merge CSS/JS in Bitrix settings, and clean the database of inactive sessions. In 98% of cases, we manage to bring even heavy websites into the PageSpeed green zone.

Why convert images to WebP or AVIF formats?

WebP and AVIF formats are designed specifically for the web. Compared to classic JPG and PNG, they compress files without visible loss of quality by an average of 30–70%. This means that a page that previously weighed 5 MB due to heavy photos in the catalog will weigh less than 1.5 MB after conversion. Lower download volume is critically important for users with slow mobile internet.

Will the website layout break after minification and merging of CSS/JS files?

We eliminate layout bugs. All optimization work is first performed on a test server (Staging). We configure build tools, check the browser console for JS errors, and test responsiveness across all browsers (Safari, Chrome, Firefox) and operating systems. Only after complete verification and QA testing do we move the optimized code to the live site.

Traveler on a snowy mountain peak before the moon

SPEED AND TECHNICAL SEO

Technical optimization
of your website

Technical SEO optimization of websites and load acceleration to meet Google Core Web Vitals requirements. Image compression in WebP/AVIF, CSS/JS minification, Brotli and Redis caching configuration.

Optimization stages

LIGHTHOUSE
CORE WEB VITALS
PAGESPEED

CODE
GRAPHICS
CACHE
SERVER

90+ PageSpeed score
target project level

GOAL
SPEED
STABILITY

700+completed
projects

2011year of start
of studio

40+niches and business-
models

2023Google
Premier Partner status

Development,
marketing, analytics

Performance

A fast website is key to high search rankings and high conversion

Google and Yandex have officially announced page loading speed as a ranking factor. In the era of Mobile-First indexing, search robots evaluate your site based on mobile device characteristics on 3G networks. A slow site is penalized in search results, and users leave for competitors. Studies show that 53% of mobile visitors close the tab if the page takes longer than 3 seconds to load.

We conduct comprehensive, turnkey technical optimization of the site. Our goal is not just to install a caching plugin, but to overhaul the resource loading structure. We bring your project metrics into the green zone of Google PageSpeed Insights and satisfy all key metrics Core Web Vitals: Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP).

We work directly with backend code, theme files, SQL databases, and server configurations (Nginx, PHP-FPM, Redis) to achieve record-breaking performance numbers.

Accelerating page loading up to 90+ score in mobile and desktop Google PageSpeed
Optimization of Core Web Vitals (eliminating CLS layout shifts, accelerating LCP)
Lossless image compression with conversion to next-gen WebP/AVIF formats
Minification, merging, and deferred asynchronous loading of CSS styles and JS scripts
Server-side Brotli/Gzip compression, Cache-Control headers, and Redis object cache configuration

53%

Visitors leave from smartphones if a website takes longer than 3 seconds to load

90+

PageSpeed points — target performance level for our projects

<0.5 s

First Contentful Paint time after optimization

-70%

Reducing the overall weight of loaded assets (code, images, fonts)

Core Web Vitals prioritized

Layout shifts during banner or font loading (CLS) annoy users and get penalized by Google. We strictly fix block dimensions (width/height) and preload critical resources, solving this problem.

Our approach

Three milestones technical optimization

We speed up website performance at the frontend, backend, and web server configuration levels.

Frontend Optimization

We minify CSS and JS code, removing unnecessary spaces, comments, and unused styles. We implement asynchronous loading of heavy external scripts (Yandex Metrica, Google Analytics, live chats) so they do not block interface rendering.

Fonts are loaded using the `font-display: swap` rule, which prevents invisible text from appearing.

Next-gen graphics compression

Heavy images are the main reason for slow loading speeds. We compress photos without quality loss and convert them into modern WebP or AVIF formats, which weigh 3 times less than standard JPG and PNG.

We also implement lazy-loading for off-screen images.

Server-side optimization (TTFB)

A fast server should return the time to first byte (TTFB) in less than 200 ms. We configure web server-side caching (Nginx/Apache), enable advanced Brotli compression, and configure OPcache for PHP and the database.

This reduces CPU load on the hosting and speeds up page generation.

Process

Stages technical optimization

Step-by-step workflow for auditing, refactoring code, and setting up the web server.

Diagnostics and metric collection

We analyze the website via Google PageSpeed Insights, Lighthouse, and WebPageTest. We measure TTFB, LCP, CLS metrics and collect a log of blocking resources.

Graphics conversion and compression

We scan all image folders. We compress via console utilities and convert to WebP/AVIF. We implement `picture` markup and lazy-loading.

Code optimization (JS/CSS)

We combine small CSS/JS files into bundles, minify code, and extract above-the-fold critical styles (Critical CSS) for instant rendering.

Compression and cache setup

We configure the web server: enable Brotli compression (it is 20% more effective than Gzip), set up static caching in the client's browser for 1 year.

SQL database acceleration

We analyze slow database queries. We create missing table indexes, clean up junk revisions in CMS, and set up Redis object cache.

Final Lighthouse audit

We re-test in all ad and organic environments. We record green zones in PageSpeed and submit the report.

Our stack

Speed optimization technologies

We use modern caching, graphics encoding, and server configuration tools.

Google Lighthouse

The gold standard for performance diagnostics. Evaluates a website on a 100-point scale across Performance, Accessibility, Best Practices, and SEO categories.

Brotli & Gzip compression

On-the-fly data compression during network transmission. Google's Brotli compresses text files (HTML, CSS, JS) more effectively than regular Gzip, reducing mobile data consumption.

Redis & Nginx Proxy Cache

Ultra-fast caching in server RAM. Eliminates repeated heavy PHP requests to the database on each user visit.

— COST

Pricing technical optimization

The price depends on the CMS used (WordPress, Bitrix, OpenCart, custom code), website size, and current PageSpeed score.

Features	Basic acceleration Optimal for landing pages and business card sites on standard CMSs 25 000 ₽ Timeframe: up to 7 days	Popular Comprehensive optimization Full Core Web Vitals and server cache 55 000 ₽ Timeframe: up to 14 days	Tech SEO Enterprise For e-commerce stores and high-load portals from 110 000 ₽ Timeframe: from 20 days
Target Google PageSpeed Insights score (Mobile)	80+ score	90+ score (green zone)	95+ score (maximum acceleration)
Converting images to WebP / AVIF	✓ WebP format	✓ WebP and AVIF formats	✓ Dynamic on-the-fly conversion
Minification and concatenation of CSS/JS assets	✓ Standard compression	✓ Compression + Critical CSS inline	✓ Full asset bundler refactoring
Server compression and cache setup	Gzip and browser cache	Brotli, OPcache, and Redis caching	Brotli, Redis, Nginx FastCGI/Proxy Cache, CDN
Optimization of database and SQL queries	—	Database cleanup and basic indexes	EXPLAIN profiling, table optimization
Lazy loading of heavy chats/metrics	—	✓ Via setTimeout/IntersectionObserver	✓ Custom Lazy Parsing Script

— QUESTIONS AND ANSWERS

FAQ
about website acceleration

Is your website loading slowly on smartphones or failing Google tests? Write to us — we will send a precise Core Web Vitals audit for free.

Ask a question

What are Core Web Vitals and why are they important for SEO?

Core Web Vitals is a set of three key metrics from Google that evaluate real user experience: 1) LCP (Largest Contentful Paint) — page main visual content loading speed (norm — less than 2.5 seconds); 2) CLS (Cumulative Layout Shift) — layout stability, absence of sudden block shifts during loading (norm — less than 0.1); 3) INP (Interaction to Next Paint) — interface response delay on user click. If a website does not fall into the green zones of these metrics, Google penalizes its search rankings.
Is it possible to speed up an old 1C-Bitrix or WordPress website?

Yes, we speed up websites on any CMS. On WordPress, we disable unused plugin styles, configure Redis object cache, and optimize heavy SQL queries. On 1C-Bitrix, we configure Composite Website technology, optimize component autocaching, merge CSS/JS in Bitrix settings, and clean the database of inactive sessions. In 98% of cases, we manage to bring even heavy websites into the PageSpeed green zone.
Why convert images to WebP or AVIF formats?

WebP and AVIF formats are designed specifically for the web. Compared to classic JPG and PNG, they compress files without visible loss of quality by an average of 30–70%. This means that a page that previously weighed 5 MB due to heavy photos in the catalog will weigh less than 1.5 MB after conversion. Lower download volume is critically important for users with slow mobile internet.
Will the website layout break after minification and merging of CSS/JS files?

We eliminate layout bugs. All optimization work is first performed on a test server (Staging). We configure build tools, check the browser console for JS errors, and test responsiveness across all browsers (Safari, Chrome, Firefox) and operating systems. Only after complete verification and QA testing do we move the optimized code to the live site.