For the publisher and advertiser signup process, most of the time the usual filling out of the company and user information is not sufficient enough info to consider the account as a solid publisher or an advertiser for your network. Therefore before the client finishes the signup process, it is usually best to have the account give out more data about what type of channels they market to, their marketing experience and how much traffic they expect to send to your network. Advertisers can unveil what experience they have with performance marketing along with any data on how they intend to pay out for their offers, and so forth.
You are able to add extra fields to your publisher and advertiser signup pages so that they are able to provide this info along with anything else that you would want to know from them before they get to your network. These fields can be very helpful when deciding to approve or reject an account from your network.
To get to this setting go to,
Settings > System Preferences > Sign Up Questions.
To add questions you can click on the “Create Question” button.