Facebook is one of the most effective platforms to advertise your business simply because YOUR audience is on it.
In fact, there is currently close to 3 billion users on it. And it's still on a growth trajectory.
In that case, advertising on Facebook should be easy, isn't it?
It was easy when there were few advertisers in the beginning...
BUT today there are over 10 million active advertisers, and that's not counting businesses that are just starting out.