A chalkboard typeface is a kind of writing style that looks like it was made using chalk on a blackboard. You know how you write your name or words on a board with a piece of chalk? That's what this typeface looks like!
When you look at this typeface, the letters seem to be a bit smudged or fuzzy, just like they would be if you used chalk. This style is often used on signs, menus, or other things that you might see in a restaurant, cafe, or school.
The reason that people like to use this typeface is because it makes things look kind of old-fashioned and cozy. It makes you feel like you're back in school, drawing on the blackboard with your friends.
So overall, a chalkboard typeface is just a special way of writing letters that looks like it was made with chalk and a blackboard.