This page shows examples of three different content blocks. This is a Rich Text box. Below is an example of a Call To Action field. There you can create CTA buttons with custom text, position them, and link them to Assets (like PDF's), other Entries or a specific URL.
The below block will take a YouTube URL and embed it in the page.
This block is very versatile.
And the File button allows you to upload and link to other assets like PDF's.