Quality Score Fluctuates

Quality Score Changes. Don't know why and what to do?

[chriskriag]

Hello,

I am handling an account, in the past week the QS of 5 keywords drops by 1-2 points. I don't know why this is happening?

When I started the Campaign some of the keyword had 4 quality score then it went to 5 till 7 and then suddenly past week drop to 5 & 4 for some keywords.

What is impacting the quality score? What is the biggest factor for such drop. Does CTR fluctuates QS?

Also I want to know does using broad modifier is good for QS & CPC?

[buckworks]

Others have also been reporting changes in their quality scores lately. Your experience might be related:

[webmasterworld.com...]

As for using modified broad match, it gives you more control than regular broad match, but you still need to watch for negative keywords that ought to be blocked.