After running a campaign for almost 2 months my QS went from a 10 to a 1. Any idea why something like this could happen with no changes done anywhere?
I had a lot of clicks. Over 1200 clicks a day. 29% bounce rate. Position #1. ~40-45% CTR. It was an awesome ad.
must be an affiliate: The keyword, your google ad, and your presale page should be relevent in some way. If all three have the same verbage, then something is wrong with the landing page. Popups? Funnel Pages? No buy now links unless you put in your email address in. Make sure your keyword is in the ad, in the sales page and the landing pages. Everything else is in the delivery.
To be honest it is extremely relevant. I have no pop-ups or anything. It is an affiliate page but it is actually a site with over 30-50 pages.
Try Google's keyword analysis tool - there is a button with magnifying glass next to each keyword. See if it will give you any useful information.
It just says that it is landing page quality. I'd like to refrain from giving out that information Help Desk, but I do appreciate you trying to help out!
If it is the landing page quality then go into google webmaster tools (if you have it) and use the "what google sees" function an it will show all the keywords it sees. If you keywords is not well represented on it then you need to adjust you landing page.