16 Nov 09 11:15 am
I'd definitely have to say it depends on the popularity and variety of your market, as well as they keywords you're using. For example when I've advertised World of Warcraft guides (a very broad and generic market), a lot of keywords can be 1000 impressions a day. But the CTR? Terrible, 0.2% for most keywords. So only a few clicks per day. But when I've advertised a much more specific niche, "Get out of debt" guides. I might only be lucky enough to get 80 impressions a day on most keywords, but the average CTR will be 10 to 20%.
For me, personally, impressions aren't as important as your total clicks, CPC and CTR as these will be the deciding factors on your return on investment (ROI). I use impressions to enhance and adjust my campaigns, I don't build my campaigns around impressions.
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