I have perfectly organized agroups for each campaign. Even an adgroup with one keyword and a dedicated landing page for each adgroup but still there is no change for the QS for my keywords. I've had a partial success with this as 30% percent of my keywords have got QS >=5
However, I've noticed that highest the first page bid for a keyword the lower QS you are going to get even if you have the most relevant adgroup, ads, and landing page.
Is there a way I can improve QS for those keywords from 3 or 4 to 5, other then improving the quality of the ads and content on the landing pages.
It is fairly new account, so age of an adword account is a factor?
Also, should I delete the keywords having low quality score if the QS for those keywords doesn't improves over a period of time..