Are the tags categories and vice versa or is there something different I'm missing?

I'm new to all this so the learning curve has made me look like a fool sometimes. I noticed an article on here before that mentioned categories being displayed based on an algorithm involving the value(money being moved) and attention it is getting. Maybe some other stuff too, can't remember now exactly. Might be able to find it in a search.

I will use what you recommended though. I wish I did from the start after seeing them. Good choices.

Like the picture too.