Server-Side Rendering

An approach where the web server assembles a page's complete HTML before sending it to the web browser. The browser receives a finished page and can show it right away, with no extra work required to fill in the content.

Server-side rendering (or SSR) is the traditional way the web works. Pages tend to load fast on first view and are easy for search engines to read. The contrast is client-side rendering, where the browser does the assembly itself using JavaScript.