In this DaddyDev lesson, Ryan E. Hamilton teaches the kiddos what exactly HTML tags are and how to view their elemental nature as the "building blocks" of a webpage, but also as "containers" that can hold content.
In that sense, most HTML tags are like "stackable containers", which can be used to build anything on a webpage.
Ryan also discusses the three kinds of optional content that can be placed inside HTML tags.
Optional Tag Content 1: Nothing
<html></html>
Optional Tag Content 2: Text
<html>Hello world!</html>
Optional Tag Content 3: Other HTML Tags
<html><p>Hello world!</p></html>
Enjoy! 8)