When to use display: block?

I don’t see the advantages of or know when to use the display: block; or display: inline-block, except when creating a horizontal nav bar. When else would I possibly use it?

Display:block; and Display:inline-block are not the same thing. they both do different things. Here is some documentation why these two are different from each other.

There are a lot of different ways you can choose to display your element. Here is some documentation on the matter.