[Exclusion] example.com Use this format if you'd prefer that your ads be excluded from a particular domain and its subdomains, directory names, individual pages and so on. Ads won't appear on example.com, www.example.com, www1.example.com, www.example.com/stuff, www.example.com/stuff/page.html or placement.example.com [2] Acceptable [Level] 
Top-level domain name