If a keyword fails to display your ads, it's possible that negative keywords are to blame. Negative Keyword Conflicts identify overlapping negative keywords that are keeping targeted keywords from bidding so you can review and remove them.
Resolving keyword conflicts
In Notifications with the Workshop
Resolve negative keyword conflicts via Negative Keyword Conflicts notifications. Use the Workshop to modify, pause, or delete negative or targeted keywords.
In Manage
Go to Manage (globe icon) in the left menu.
Select Accounts.
Click on an account from the list.
Go to Account Settings near the top.
Choose Keyword Conflicts under Account Tools in the settings menu.
Click the > icon next to the negative keyword to reveal the blocked content.
Select the checkbox(es) next to the keywords you want to remove.
Click Remove # Keyword Conflict in the blue bulk edit menu.
Deleting the negative keyword will allow the targeted keywords to start bidding. The negative keyword will be removed from all instances where it was applied, such as a shared set.
Note: You can also see if a keyword has conflicts by navigating to the keyword section of an account. The status of the keyword will be bright red and read Conflict. Once the negative keyword is removed, the conflicted keyword will have a green status of Eligible.