What is performance in the context of SEO?

Performance in the context of SEO is a group of technical indicators that reflect a site's loading speed and overall performance for the user. Search engines (especially Google) evaluate performance as one of the ranking factors, because fast sites provide a better user experience.

#What performance includes:

1. Page loading speed How quickly a user sees the first content and can start interacting. The longer the wait, the higher the chance they leave.
2. Core Web Vitals (Google's key metrics) Three main indicators:

• LCP (Largest Contentful Paint): loading speed of the main block;
• FID / INP: responsiveness and delay on first interaction;
• CLS (Cumulative Layout Shift): layout stability (nothing should jump during loading).

3. Resource optimization How the site's files load: images, fonts, CSS, JS. Their size and count directly affect speed.
4. Server response time If the server is slow, the page will be slow too, even with an optimized frontend.

#Why this matters for SEO:

• search engines rank fast sites higher;
• users leave less often and interact with the page longer;
• improving performance directly reduces the bounce rate.

Summary: performance is the technical speed and convenience of loading a site, which affects both ranking and user behavior.