Blacklisting is excluding a feed, a domain, a keyword, IP from your campaigns.
BLACKLIST A FEED
We strongly recommend you to blacklist the Pub subid instead of the whole feed (Traffic source). Within one feed there could be some Pub subid that convert well and others not at all.
Go to Dashboard / Reports / Reports by Campaign and break down the campaign by "feed" (traffic source), clicking on the "+" button. Enter the feed / pub subid to blacklist
To identify the subID you should blacklist, check our post about optimization. Once you have identified the pubfeed.subid, edit your campaign on the campaign screen menu.
Scroll down to "TQ & Analytics", select what you want to do, and enter the all the pubfeed.subid (one per line) you need. For example, if the Pubfeed is [72179] and the Subid is [69641], you will have to enter it like that: [72179.69641]
Please note: you can leave the combo "blank", meaning you select to work without blacklist and without white-list.
BLACKLIST A KEYWORD OR A DOMAIN
You might also want to blacklist a specific keyword or a domain you don't want your pop to appear. In Keyword targeting, there is a mode called negative keyword. You can use that mode to blacklist domain (or a word) by putting the domain name as negative keyword.