Can Quality score of any keyword will become 10 after passage of time.?
Means let us suppose i have keyword "red shoes" in my camp. few days back QS was 6 now QS is 7. The camp is 15 months old. is it possible it will reach QS of 10 after may be one year from now.
Re: Quality Score
There is no definite time when the Quality Score of any keyword reaches 10.
But yes if your QS is 7, that means it's a good competitive Quality Score. You should try and optimize your campaign regularly and try to work on the benchmarks Google has already defined revolving around this magical metric called Quality Score.
Your prime aim should be to achieve competitive ROI for the keywords you are bidding on, once you have a high Quality Score (i.e. which you already have).