This is an interactive site that helps you to view the different types of HTML elements. Clicking on the buttons on the top filters the elements.
You should know all of the Core elements. Important sub-sets are:
- Setup: These elements set up the page so that it is ready. Most of these elements will be used on every page you create.
- Page Structure: These elements are used to structure the different content areas of the page (inside of the body).
- Core Text: Text is still the most common type of content. These are the core elements for text.
Here is a periodic table of elements that is a bit more complete than mine and also categorizes the elements like the MDN does on this HTML Elements Reference.
HTML5 Periodic Table: https://websitesetup.org/html5-periodical-table/