Web pages consist of a header, body and footer. Each of those Sections have parts that make up the whole, and we call them "blocks". Here's an example illustration of blocks on a website page when you are in "edit page" mode:
Linking comes after you find out which Section you wish to link to. The link of the Section is the first icon option at the top-right of each block. Here's a closer look:
If I click that icon, I will see the link to this block, or Section of the website page, as illustrated below:
Copy this link to clipboard. Finally, create your link elsewhere on your site as planned, and past the above anchor link.