The term 'server-side rendering' refers to the process where web pages are generated on the server and sent to the client’s browser in a fully rendered state. This approach contrasts with client-side rendering, where the browser builds the page using JavaScript. Server-side rendering enhances performance, improves SEO capabilities, and provides a better initial loading experience for users, as they receive fully rendered pages rather than waiting for scripts to load. It is particularly useful for applications requiring fast page load times and better search engine visibility.