The truth is that I didn’t know what Emmet was until I have seen the integration with Visual Studio Code, but it seems to me a very powerful way to save time when you need to generate HTML code. To give you an idea, Emmet plays with a series of snippets that let you assemble structures in HTML in a super fast way, as you can see in this example:
Take a look at this cheatsheet to see all available options.
Happy coding!