The term "reader profile" refers to a description or analysis of the characteristics, habits and preferences of a particular group of readers. Full definition
The goal is to get early feedback on your work from readers who fit an ideal reader profile or who are professional editors familiar with your book's genre and topic. (toughnickel.com)
It also offers the opportunity for targeted content based on reader profiles and locations. (adage.com)
We have to define our specific reader profiles in order to properly market to them. (happyselfpublisher.com)