"Dismissed" ads in 30 day history

I need some clarification regarding ads. Brave says that ads count as being viewed just by popping up on your screen, so I’m wondering, after viewing my ad history and seeing that a lot of ads are labelled as “dismissed”, some “viewed” and some “clicked” what actually constitutes a dismissed ad? What action does a user have to take to make an ad be labelled as dismissed? And do you still receive BAT for dismissed ads?