Use the blacklists menu to exclude emails, and domains to make your targeting more accurate.
You can upload a list of clients email addresses for example to the email blacklist to prevent the software from emailing your clients.
You can blacklist domains to ensure that the software will not email those domain names, either because they are not relevent, or because they have requested to opt-out from future emails.
You can also use the pattern matching functionality of the domain filter to exclude a range of websites, for example news and jobs websites from your search.
The above video demonstrates how to take best advantage of these advanced features.