A font is a series of letters, but not just any series of letters. It's a carefully crafted set of glyphs, lovingly arranged to make you go "hmm, this text is actually readable!"
In the world of typography, a real font is one that's been carefully crafted by a team of highly trained, highly caffeinated font designers. They're like master craftsmen, but instead of woodworking, they work with pixels and vectors.
But what's the difference between a real font and, say, a fake font? Well, a real font is like a fine wine, whereas a fake font is more like that cheap stuff they serve at the hotel bar. Same letters, different experience.
Want to learn more about the world of real fonts? Click on the following subpages: