Html can be used for different things. Especially on websites!
Html can be used for titles Here is a big title
Or even smaller titles
Html can also be used for embedding YouTube and other sites videos
Here is one of my videos that I have embed (not copyright)
To use the Html titles use <h1> and then use the text and</h1> to close the text!
You can use <h2> and smaller to make it smaller<h2> and down lower.
To import YouTube videos click the share button and click Embed and then copy in into your website and it should import. If you are making a website or pure code it may be harder to do.
For this tutorial I am using WordPress which is a free website maker but keep in mind that you need to purchase the domain and hosting to add WordPress from. There should also be a tutorial on how to do that on my channel soon.
This is used for websites and making games and other applications.