just curious if anyone that runs an adwords campaign notices the amount of impressions which I understood to be "searches" is way higher than the estimated made by google in their keyword tool? Am I missing something? When i run a campaign for say 2 keywords - the amount of impressions I get if I multiplied it by 30 (one month) would be way more than what they say in their keyword tool. Any ideas?
Impression share is a measure of how often your ads are appearing for searches that are relevant to your ads. It will always differ slightly based on the Keyword Match Option and negative keywords saving clicks.