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How many impressions?
Does anybody have any idea how many impressions Google (adwords) considers when assigning your CTR to create a ranking score.
Let me explain...
Your score in adwords is CTR x MaxCPC (or the CPC required to attain your highest possible position up to your Max CPC).
But over what period of time does Google assess your CTR (i.e. last 1000 impressions, impressions yesterday or every impression you have ever received) when allocating your ranking score?
Any stats would be much appreciated.
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