HTML Bookmarks and HTML Anchors and (WordPress) Page Jumps
These things allow you to link to defined, set attribute link locations as places within a webpage, blog post, blog page, or element of HTML code. You can then link to those anchors to navigate up and down throughout your article.
Read more about HTML anchors (in this linked page referred to as HTML Bookmarks) at https://www.w3schools.com/html/html_links_bookmarks.asp (the link opens in a new tab).
Find more on the “HTML <a> Tag” at https://www.w3schools.com/tags/tag_a.asp (the link opens in a new tab).
In WordPress, HTML anchors are termed “Page Jumps.” Read the WordPress.org article on “Page Jumps” (the link opens in a new tab).