This is a subtle but very far reaching part of the web.  The ability to link to link to text fragments.  One of the least appreciated parts of the web is that every page can have multiple items in it, and it is possible to link to them.  This adds an extra layer of decentralization by linking to something in the page, rather than linking to the title or name of the page.

https://alfy.blog/2024/10/19/linking-directly-to-web-page-content.html