Speed
Third-party scripts
Why it matters
Scripts from other domains (ads, chat widgets, analytics, A/B testing) add DNS lookups, connections and main-thread work you do not control. A slow third party can delay your whole page.
How to fix it
- Remove tags you no longer use.
- Load the rest with async or defer, or after consent.
- Self-host small libraries instead of loading them from public CDNs.
Check it with
- Website Technology Checker – Find out which CMS, frameworks, analytics, CDN and server a website uses.
- Page Speed Test – Lighthouse performance score, lab metrics and real-user Core Web Vitals for any page.
Scoring: a passed check earns its full weight, a warning half and an error none. How the SEO score works