So I'm very new to coding and I wanted to use some of the templates that some users have so graciously offered, but I'm sad to say I have no idea how to use the ones from this site. They're absolutely amazing, but when I try to test them and see if they work, most of the time they come out jumbled up.

I have the newest v2.2.0 style tag, but with that it will not work. Is there another plugin that this site uses that I'm not aware of?