Why does conversion & CTR depends on CPC?
I've noticed that ad CTR and conversion seem to depend on your PPC bid. Usually lower bids tend to convert less and have lower CTR. The only explanation I can see for this is the quality of traffic - say higher bids get displayed on better quality sites and and hence attract better quality traffic. It may also depend on a day of the week, but less likely. Is this your observation too and if yes, how do you explain it?
Also if you know a keyword has a good CTR and but low conversion, do you tweak CPC to test how the conversion changes depeding on your ad position? (top1, top2, top3 etc.)
thanks everyone for sharing their experience!
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