Sean Quadlin serves up insights on knowing when to pause and then delete keywords that no longer work in paid-search campaigns. He puts the keywords into categories, so marketers can get an idea of when to take specific actions. He also provides ways to determine the keywords that are worth fighting for and the ones worth cutting forever. Paused for poor performance, for example, he tells marketers to make the cut after one month. Quadlin also suggests making changes in stages, rather than all at once. Read the article here.