A summary of your ideal buyer, based on market research, data and hypothesis. The representation helps marketers define their ideal audience and it helps salespeople determine lead quality. This is getting inside the head of your buyer and predicting how they might act.
Heads up marketers should have a buyer persona in order to strategize their tactics. By being able to look into and think how your buyer thinks you can tailor ads and create a better overall personalized marketing experience to them, which is a fundamental component of ABM strategy.