There are many different types of ads that you can create on Facebook such as page post engagement, page likes, offer claims, event responses, website conversions, mobile app installs, desktop app installs and video views.
Don’t be surprised if new ad types are introduced in the future because Facebook frequently experiments with their ad platform.
Besides audience targeting ads on Facebook, there are also boosted posts and Facebook events/offers. Boosted posts let you reach more people when you are promoting special offers, events or news. Facebook event/offer ads are a way to increase sales and conversions for your business.