Rendering in SEO is how a web browser shows a webpage using HTML, CSS, and JavaScript. When someone visits a site, the browser fetches files from the server to display everything correctly. If things don’t load properly or take too long, it can frustrate users and hurt your search rankings. There are two main types of rendering: client-side (which relies on JavaScript in the user’s browser) and server-side (where pages are fully prepared by the server before reaching users). Understanding how your site renders helps you improve its performance for both visitors and search engines.
