Server Side Rendering (SSR) refers to the process of generating and serving web pages on the server side. In this process, when a client (browser) request is sent to the server, the server creates the HTML content of the web page and sends it to the browser. When users visit a URL in the browser, the page content is created on the server side and sent to the browser as HTML. The browser then directly displays the HTML content received.
Server-side rendering is an important technique for modern web applications and is preferred in some cases to improve user experience and performance.