--- title: "Website Speed and Core Web Vitals" description: "We speed up your site on mobile and sort out Core Web Vitals: before and after measurements, fixes to images, scripts and caching." url: "https://it-deweloper.pl/en/web/google/core-web-vitals" date: "2026-10-16T01:27:25+00:00" language: "en-GB" --- [Skip to main content](#tm-main) - [ Home](https://it-deweloper.pl/en "IT Deweloper web studio home page") - [Contact](https://it-deweloper.pl/en/contact "Contact the IT Deweloper web studio") - [ +48 731 190 041](tel:+48731190041 "Phone") - [ office@it-deweloper.pl](mailto:office@it-deweloper.pl "E-mail") - [ Nowogródzka 4A, Białystok, Poland](https://maps.app.goo.gl/BNjvryytwRyv4omA7 "Address") - [ WhatsApp](https://wa.me/48731190041 "WhatsApp") - [ Telegram](https://t.me/+48731190041 "Telegram") - [Solutions](https://it-deweloper.pl/en/web "IT Deweloper's web development solutions") - [How we workStages of work](https://it-deweloper.pl/en/web/process "Website development stages and timelines") - 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[ Home](https://it-deweloper.pl/en "IT Deweloper web studio home page") - [Contact](https://it-deweloper.pl/en/contact "Contact the IT Deweloper web studio") - [ +48 731 190 041](tel:+48731190041 "Phone") - [ office@it-deweloper.pl](mailto:office@it-deweloper.pl "E-mail") - [ Nowogródzka 4A, Białystok, Poland](https://maps.app.goo.gl/BNjvryytwRyv4omA7 "Address") - [ WhatsApp](https://wa.me/48731190041 "WhatsApp") - [ Telegram](https://t.me/+48731190041 "Telegram") - [Solutions](https://it-deweloper.pl/en/web "IT Deweloper's web development solutions") - [How we workStages of work](https://it-deweloper.pl/en/web/process "Website development stages and timelines") - [SEOSearch engine optimization](https://it-deweloper.pl/en/web/seo "SEO promotion: optimization, links, positions in Google") - [GEOWebsite promotion in AI](https://it-deweloper.pl/en/web/geo "GEO optimization: website promotion in ChatGPT, Gemini and Perplexity answers") - [AIArtificial Intelligence on the website](https://it-deweloper.pl/en/web/ai) - [JoomlaWebsite Management System](https://it-deweloper.pl/en/web/joomla "Joomla website development") - [GoogleGoogle services setup](https://it-deweloper.pl/en/web/google "Google services setup for your website") - [Cost](https://it-deweloper.pl/en/cost "Rates and cost of services") - [PricingIndicative website development prices](https://it-deweloper.pl/en/cost/pricing "Website development prices") - [CalculatorSelf-service online estimate](https://it-deweloper.pl/en/cost/calculator "Calculate your website cost online") - [BriefGet an accurate project quote](https://it-deweloper.pl/en/cost/brief "Fill out the website development brief") - [Portfolio](https://it-deweloper.pl/en/portfolio "Portfolio and examples of our work") - [About us](https://it-deweloper.pl/en/about "About the founder — Victor Parhimchik") - [FAQ](https://it-deweloper.pl/en/faq "Frequently asked questions about website development") - [Blog](https://it-deweloper.pl/en/blog "Articles on website development and promotion") ![Website speed and Core Web Vitals icon: a speedometer, faster page loading](https://it-deweloper.pl/images/Web-development/core-web-vitals-hero-2x.webp) CWV # Website Speed and Core Web Vitals We measure speed on mobile, find the causes of delays, fix images, scripts, caching and fonts, and show you the before and after measurements. [ Setting Up and Integrating Google Services for Your Website ](https://it-deweloper.pl/index.php?option=com_content&view=category&id=44&lang=en-GB) ## Why people come to us ### The site opens slowly on a phone Visitors leave before the page appears, and the ad that brought them is already paid for. ### PageSpeed shows red numbers LCP, INP, CLS: it is unclear what they mean and where to start. ### Core Web Vitals in Search Console are not in order Google shows that some pages load slowly or “jump around”. ## What the work includes - **Mobile measurement.** We measure in PageSpeed Insights and in the Core Web Vitals report in Search Console - **Images.** We compress, size and lazy-load them - **Caching and compression.** We configure caching and compression on the host - **Scripts and styles.** We remove what is unused and defer what is not essential - **Fonts and external services.** We connect them so they do not delay the page - **Measurement after the fixes.** We compare the numbers before and after the work ## How we work 01 ### Measure We test the home page and key pages on mobile. 02 ### Find the causes We find heavy images, scripts and styles. 03 ### Rank by importance We list the fixes by expected gain. 04 ### Fix We make the changes without breaking how the site looks or works. 05 ### Measure again We compare with the first measurement. 06 ### Hand over We give you a report and recommendations for the future. ## What you get Measurements before and after the work Fixed images, caching, scripts and fonts A list of what remains on the hosting or third-party side Recommendations on how not to lose speed during updates ### What you need to start --- - Your site address and access to it and to the hosting - A list of key pages - Consent to a backup before the changes We work remotely with companies in Poland and the EU, and in Białystok and the Podlaskie region we can also meet in person. ## The honest limits - Google's measurements are lab tests and vary from run to run: we look at the trend, not a single number. - Speed is one factor among many. We do not promise a place in results. - Some delays come from hosting and third-party services: we will show what can be fixed on the site and what cannot. - Changes to the site itself, such as copy, speed or structure, are separate work at our price list rates. ## Frequently asked questions - [What are Core Web Vitals?](#)Three Google metrics: how quickly the main content appears (LCP), how quickly the site responds to actions (INP) and how stable the layout is, meaning it does not jump around (CLS). - [Why is it fast on my computer and slow on a phone?](#)Tests run on a typical mid-range phone with a mobile connection: it is weaker than your computer, so heavy images and scripts are more noticeable on it. - [Can I check speed regularly?](#)Yes. There is a service for that: [website speed checks with an AI assistant](https://it-deweloper.pl/en/web/ai/pagespeed-ai). - [How much does it cost?](#)From €30. We give the exact price before work starts, after a short conversation about your site. Prices for other Google services are in the [price list](https://it-deweloper.pl/en/cost/pricing). - [Will it work if you did not build my site?](#)Yes. We work with sites on any platform, including ones built by others. We start by checking what is already connected. ## Tell us about your site's speed We will suggest where to start and give you a price before work begins. You can find our other Google services on the [“Google”](https://it-deweloper.pl/en/web/google) page. [Contact the studio](https://it-deweloper.pl/en/contact) Price from 30 € [ ![Google Analytics 4 to BigQuery export icon: a database, a store for raw website events](https://it-deweloper.pl/images/Web-development/bigquery-hero.webp) ### Google Analytics 4 Export to BigQuery We create a Google Cloud project in your name, link it to GA4, switch on the event export, check the data and set up cost control. We can build repor… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=236:bigquery&catid=44&lang=en-GB) [ ![Google tag gateway icon: an arch with an arrow passing through, Google tags served from your domain](https://it-deweloper.pl/images/Web-development/tag-gateway-hero.webp) ### Google Tag Gateway Setup We connect tag gateway through a CDN, check that Google tags load from your domain and data arrives, and keep visitor consent respected. ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=232:tag-gateway&catid=44&lang=en-GB) [ ![Website speed and Core Web Vitals icon: a speedometer, faster page loading](https://it-deweloper.pl/images/Web-development/core-web-vitals-hero.webp) ### Website Speed and Core Web Vitals We measure speed on mobile, find the causes of delays, fix images, scripts, caching and fonts, and show you the before and after measurements. ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=228:core-web-vitals&catid=44&lang=en-GB) [ ![Google Workspace icon: an envelope, business email on your own domain](https://it-deweloper.pl/images/Web-development/google-workspace-hero.webp) ### Google Workspace Business Email We connect Workspace to your domain, create staff mailboxes, add the DNS records (MX, SPF, DKIM, DMARC) and check delivery, including messages sent f… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=224:google-workspace&catid=44&lang=en-GB) [ ![reCAPTCHA form protection icon: a shield with a padlock, protecting website forms from spam](https://it-deweloper.pl/images/Web-development/recaptcha-hero.webp) ### reCAPTCHA Form Protection We connect reCAPTCHA to your forms, check where your site's keys are now managed, test submissions and reflect the service in your privacy policy. ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=220:recaptcha&catid=44&lang=en-GB) [ ![Google Maps for your website icon: a pin on a map, an office map and address suggestions](https://it-deweloper.pl/images/Web-development/maps-platform-hero.webp) ### Google Maps for Your Website We match the solution to the job: a simple office map without a key, or an API connection with address suggestions and directions. We protect the key… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=216:maps-platform&catid=44&lang=en-GB) [ ![Google Ads setup icon: a target with an arrow, ad campaigns and conversion tracking](https://it-deweloper.pl/images/Web-development/google-ads-hero.webp) ### Google Ads and Conversion Tracking Setup We link Google Ads to analytics and your shop, set up counting of enquiries, calls and purchases, test it with test enquiries and, if needed, launch… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=212:google-ads&catid=44&lang=en-GB) [ ![Data Studio report icon: a pie chart and bars, one report for your site and advertising](https://it-deweloper.pl/images/Web-development/data-studio-hero.webp) ### Data Studio Reports We connect the data sources, build an owner report with the key figures for your site, search and advertising, and set up automatic refresh. Access i… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=208:data-studio&catid=44&lang=en-GB) [ ![Cookie banner and Consent Mode v2 icon: a cookie with a bite taken out, visitor consent to cookies](https://it-deweloper.pl/images/Web-development/consent-mode-hero.webp) ### Cookie Banner and Consent Mode v2 We connect a consent banner with cookie categories, pass the visitor's choice to Google in all four signals and check that it really reaches Google. ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=204:consent-mode&catid=44&lang=en-GB) [ ![Google Tag Manager setup icon: a tag with a hole, managing website tracking codes](https://it-deweloper.pl/images/Web-development/gtm-hero.webp) ### Google Tag Manager Setup We install Google Tag Manager, move existing counters over without duplicates, set up tracking for forms, clicks and calls and document the container… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=200:gtm&catid=44&lang=en-GB) [](#) [](#) ## Build your website Find out what your website will cost [ Pricing ](https://it-deweloper.pl/index.php?Itemid=262&lang=en-GB) ![](https://it-deweloper.pl/media/yootheme/cache/3c/background-square-01-3c44c74f.png?src=images/yootheme/demo/background-square-01.png&thumbnail=900,900,&hash=72c31958) ![](https://it-deweloper.pl/media/yootheme/cache/cb/background-square-03-cbb341a0.png?src=images/yootheme/demo/background-square-03.png&thumbnail=600,600,&hash=6e9dde93) ### [ Contact ](https://it-deweloper.pl/index.php?Itemid=277&lang=en-GB) Web studio IT Deweloper website development, Poland. 5423493188 SEOAIAdsWebSMM ### Address Nowogródzka 4A Białystok, 15-490, PL [ ### Phone +48 731 190 041 ](tel:+48731190041) [ ### Email This email address is being protected from spambots. You need JavaScript enabled to view it. ](mailto:office@it-deweloper.pl) [ ### WhatsApp ](https://wa.me/48731190041) [ ### Telegram ](https://t.me/+48731190041) Opening hours: - Monday 0900–1800 - Tuesday 0900–1800 - Wednesday 0900–1800 - Thursday 0900–1800 - Friday 0900–1800 - Saturday 0900–1600 - Sunday closed ![IT Deweloper](https://it-deweloper.pl/images/Logo.webp) Web development can be interesting! Our social media, with content about building websites. - [](https://www.facebook.com/ITdeweloper) - [](https://www.linkedin.com/company/it-deweloper) - [](https://t.me/IT_deweloper) - [](https://www.instagram.com/it_deweloper/) - [Portfolio](https://it-deweloper.pl/index.php?Itemid=264&lang=en-GB) - [Contact](https://it-deweloper.pl/index.php?Itemid=277&lang=en-GB) - [About us](https://it-deweloper.pl/index.php?Itemid=261&lang=en-GB) **it-deweloper** — a web development studio. We design and build modern websites and online stores. © [it-deweloper](https://it-deweloper.pl/en). 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