What is Server-side rendering? Definition and explanations
Server-side rendering (SSR) builds a page's HTML on the server, on every request, before sending it to the browser. The visitor therefore sees content without waiting for JavaScript to run, and search engines receive a complete page. It suits personalised or fast-changing pages; it costs server time on every visit, unlike static generation.
In one sentence
Server-side rendering builds the HTML on every request, before sending it to the browser.