Server Side Rendering
In plain terms
Generating HTML on the server before sending it to the browser.
Going deeper
SSR renders pages server-side so users get ready content fast and search engines can index it, then the client hydrates it. It improves first paint and SEO.
Under the hood
Better initial load and SEO than client rendering but adds server cost and complexity; contrasts with static generation.
Examples
Next.js, Nuxt, e-commerce, SEO-critical pages, news sites.
Think of it like...
Like delivering a fully-cooked meal instead of raw ingredients to assemble on arrival.