Currently in section 9 of the HTML/CSS lessons (CSS Selectors) and so far I have not noticed a difference between Classes and IDs. The lesson plan implies that IDs are good for effecting one kind of element, however while playing around I quickly noticed that a single ID could be attached to multiple differing elements in the HTML code.
My question is thus: At this level of coding is there a functional difference between the way Classes and IDs work? And if not is there a functional difference in more advanced uses of the selectors that I will soon learn about?
Thanks for your time.