Next.js has two forms of pre-rendering: Static Generation and Server-side Rendering. The difference is in when it generates the HTML for a page.

1. Static Generation

- Static Generation is the pre-rendering method that generates the HTML at **build time**. The pre-rendered HTML is then _reused_ on each request.

2. Server-side Rendering

- Server-side Rendering is the pre-rendering method that generates the HTML on **each request**.

Importantly, Next.js lets you choose which pre-rendering form to use for each page. You can create a "hybrid" Next.js app by using Static Generation for most pages and using Server-side Rendering for others.