title: How am I supposed to use index.html?
body: <p>Is index.html meant to be just the first page among many separate HTML pages, or is it supposed to be the only page, and the other pages are just snippets put inside of it? And by supposed to, I mean, what is the best/most common practice?</p>
  
  <p>I used to think the former, but I just tried using HTML5-Boilerplate and it's setup seemed like it was implying the latter. All this awful meta stuff and imports (is there a term for that?) is in the index.html, and I don't want to have to put that in every single page. Same goes with the navigation bar and the footer which is on every page. And the project structure doesn't have an html folder (obviously I could make my own, but I took it as implying I didn't need one). It sounds ideal if instead of loading a different html page I just leave a placeholder and insert another file, but I don't know how to do that other than an iframe, which would be ugly. How would this approach work, if it is the right way?</p>
  
  <p>If you couldn't tell I'm very much a beginner. I feel like this must be a common question but I don't know what the term(s) for this is, so I've been having trouble searching. Thank you</p>