Website speed optimization services
Website speed optimization is the work of making pages load and respond faster, measured against Core Web Vitals. Adwortise fixes LCP, INP and CLS by working on images, fonts, scripts, caching and server response.
- LCP, INP and CLS fixed against Google thresholds
- Images, fonts and scripts reviewed one by one
- Field data and lab data both checked after each fix
Prefer to talk? Call +44 7418 353079
- Free auditbefore any commitment
- Fixed quoteand a dated schedule before work starts
- Core Web Vitalsmeasured before every launch
- 1 managerdedicated to your account
Explained
What are Core Web Vitals?
Core Web Vitals are three measures Google uses to describe page experience: loading, responsiveness and visual stability. They are measured on real visits to your pages.
A page passes when it meets the good threshold for each measure. The thresholds are stable and published, and we use them as the targets for the work.
Core Web Vitals findings
- LCP on home pageSlow
- Image formatsConverted
- Third-party scriptsDelayed
- CLS from fontsFound
- Page cachingEnabled
Ranking factors
What are the Core Web Vitals thresholds?
| Metric | What it measures | Good threshold |
|---|---|---|
| LCP | Largest Contentful Paint: how long the main content takes to appear. | 2.5 seconds or less |
| INP | Interaction to Next Paint: how fast the page responds to taps and clicks. | 200 milliseconds or less |
| CLS | Cumulative Layout Shift: how much the layout jumps while loading. | 0.1 or less |
Common issues
What slows a website down?
- Images
- Large files and wrong sizes. We compress them, serve modern formats and size them for each screen.
- Fonts
- Late-loading fonts cause shifts and delays. We limit font files and control how they load.
- Scripts
- Heavy JavaScript and third-party tags block the page and hurt INP. We remove, defer or delay what is not needed.
- Caching
- Without it, every visit rebuilds the page. We set page and browser caching.
- Server response
- A slow server delays everything. We review hosting, database queries and the time to first byte.
Process
How does our speed optimization work?
- Measure We test key pages with field data and lab tools.
- Diagnose We find the causes of each failing metric.
- Fix We apply changes in order of effect.
- Retest We check the metrics again and report the change.
Request a free website reviewNo obligation. We reply by email.
Tools
Which tools do we use to measure?
- PageSpeed Insights. Shows field data from real users where available, and lab results.
- Search Console. The Core Web Vitals report groups your URLs by status.
- Browser developer tools. Used to trace the exact element or script behind a problem.
Request a free website reviewNo obligation. We reply by email.
Pricing
How much does website speed optimization cost?
This service is quoted after a free audit, because the price depends on the scope of work. The work depends on the platform, the number of templates and the cause of the slowdown. Speed is part of our wider technical SEO work as well.
Frequently asked questions
Do Core Web Vitals affect rankings?
They are part of Google page experience signals, but content relevance still matters more. Fast pages also help visitors complete tasks.
Why is my lab score different from field data?
Lab tests run in a controlled setting, while field data comes from real visitors on varied devices and networks. We look at both.
Can a plugin fix my speed?
A caching or optimization plugin can help, but it cannot fix heavy images, slow hosting or bloated scripts alone.
How long until the improvement shows?
Lab results change right after the fix. Field data is collected over a period, so it updates more slowly.