My quality score used to be great for most keywords until a few days ago. Now many keywords seem to be ok (6-7 out of 10) When I check the details and recommendations, I get a message that says: What should I do? Keep it up! Your keyword, ad text, and landing page quality are high. Continue to track your keyword and ad, however, as performance data can change regularly. So then what is the problem? How do I go back to great? I am concerned because I don't want the QS to keep sliding.