You can use <C-g> and <C-t> to move to the next and previous match respectively whilst you are searching with / or ?. This is useful because it allows you to preview your matches before you commit to them. It also means that your cursor never moves from its current position — so if you want to take a look around the file and immediately return back to where you are, the <C-g> and <C-t> keys are one way to do it.
Try it in the editor — start a search for the word foo with /foo, then try hitting <C-g> and <C-t> to move around the matches.