The success of your marketing program depends upon how well you have drafted your customer’s persona. If you have successful understand and created the persona of your buyer then only you can target them well.
Even selection of right media platform depends on the persona of your buyers.
These four tools not only help you to understand your buyer but give you insight into possible strategies to utilise the information in most effective ways.
Carver has created a very nice and useful infographic on those tools. Go through it.