https://telegra.ph/Structured-Programming-in-Z80-Assembly-12-17

This is a good introduction to semantic markup in HTML. Every web developer could benefit from a refresher course in the core language of the World Wide Web. Some of it has changed in recent years to be more expressive and accessible.

https://dev.to/kenbellows/stop-using-so-many-divs-an-intro-to-semantic-html-3i9i