I have two ads enabled and have them set so each one gets 50% of my total weight. But when I check the stats for them one shows 700 impressions a day and the other one shows only 4 impressions a day. What is going on? Is there a estimate of how much weight vs. number of impressions? Thanks
The number of impressions is not the best correlation to weight since you may get one ad on a high traffic site. I don't think there is a good esimate to weight to impressions that I can think of.
There is no traffic distribution. By setting it to 50% you give it a 50% chance to be pulled from your inventory into someone's ad cache if your account comes up for ad delivery. After that, it depends whether it's a busy homepage it's served on or an obscure geocities blog from a 90 year old about stitching whether you get much traffic or not.