This has been suggested before, and the general consensus was that the site is here as a place to challenge your existing knowledge.
However, my personal advice is this:
If you've learned HTML and are still confused as to how you've beat a mission, look into what servers are, how they work, and what they do. HTML is just a markup language, so it doesn't really provide much insight to the inner workings of the computer that's spitting out HTML files to you.
It's not who votes that counts, it's who counts the votes