To take advantage of the Blocked Domains feature, we recommend that you:

• Determine which, if any, sites or pages in our publisher network you might want to block for competitive reasons, or because you simply don’t wish to appear on.
• Review data from your weblogs, account reports and other account data, and determine which, if any, sites or pages in our publisher network aren’t providing adequate performance based on your business goals.
• Add those domains, sub-domains or directories to your list of blocked domains via the Account Summary page under the Administration tab in your account.

Keep in mind that the quality of traffic coming from a particular site can improve over time. If you block a domain and never unblock it to check its quality, you may be losing out on valuable traffic.