Technical SEO FAQ · Core Web Vitals, Performance & HTTP
How can third-party scripts affect SEO and performance?
Third-party scripts can consume CPU, network bandwidth and main-thread time.
Examples:
- analytics;
- chat widgets;
- advertising;
- heatmaps;
- personalization;
- A/B testing.
They can affect INP and loading performance, and poorly implemented scripts can also interfere with rendering.
Audit scripts by:
- owner;
- purpose;
- load timing;
- size;
- execution time;
- business necessity.
Related questions
- How do Core Web Vitals influence Technical SEO strategy?
- How do you distinguish lab data from real-user performance data?
- How do you prioritize performance improvements against other SEO work?
- How does image optimization affect crawling, rendering and user experience?
- How should server performance be considered in Technical SEO?
- How would you diagnose poor LCP?
- How would you investigate a sudden deterioration in Core Web Vitals?
- How would you troubleshoot CLS?
- What typically causes poor INP?