I'm struggling with a low adwords quality score on some adverts but it doesn't seem to make any sense?
1) New campaign and adgroup
2) Single keyword in adgroup with exact phase and exact match
3) Keywords in domain name
4) Keywords in adword text
5) Optimised landing page for that keyword
5.1) Keywords in title
5.2) Keywords in H1
5.3) Keywords 4-5% density in text
5.4) Links with text set to keywords
Yet I'm still getting a 4/10 quality score
Yet on some google suggested keyword which my site isn't optimised for I'm getting 7/10 quality score.