> ID’s are unique, so they don’t need a tag name to go along with it. Doing so makes the selector less efficient. I do it (for example div#header) because it h

> ID’s are unique, so they don’t need a tag name to go along with it. Doing so makes the selector less efficient. I do it (for example div#header) because it helps me knowing what is what in my CSS. I don't see anything wrong with it.