The larger questions are: 1) How targeted is my audience? 2) How well can I describe my audience? 3) How many ads do I need to sell to justify the costs asso

The larger questions are: 1) How targeted is my audience? 2) How well can I describe my audience? 3) How many ads do I need to sell to justify the costs associated with selling ads (ad server, cost/time of setting up the ad server, salesperson, etc)? "Getting" advertisers is an active process (i.e. sales) for most publications (online and offline).