franklin_dematto - 6:29 pm on May 21, 2004 (gmt 0)

Rob,

Thaks for your reply. I'm afraid that I didn't amke myself clear. I meant to ask:

Ad positions within an adgroup are determined per keyword so there is no need to just have one per adgroup.

Are you sure about this? It seems odd that Google would develop a per kw CTR tracker, and then only use it for ad position, not ad optimization.

I understand full well that CTR does not necessarily equal conversion. But I'll add that, assuming the ad is straightforward (as opposed to mysterious ads trying to draw people), they're likely to be correlated.