In my opinion, how you organize your website is very important: If you organize your website right you’ll be able to find everything when you eventually need to fine tune it, which can be quite hard if your files are scattered all over the place. At some point or another though, you’re going to end up with a query URL, for instance ?id=1. To make this more search engine friendly, you’re going to have to alter it somehow, and that’s where mod_rewrite comes in.