I have been running multiple ad sets on most of my sites. I have noticed a big variation on eCPM on certain segments. These are segments with a high number of bidders in Adwords so you have bids from the minimum of 0.10 to several dollars. By having several ad sets on a page am I diluting eCPM since I will display more ads including lower bidders? It's nice to offer more opportunities for my visitors to click on an ad but it seems like it lower the eCPM or at least cause a bigger variation in pay per click. (Note: I accidently posted this as a reply to an older string, sorry for the double post.)
You said it yourself. Btw, a surfer can only click on ONE link at a time. It appears to me, like on some sites just a few ads make better eCPM, Thats what it does quiet obviously, but again, it might depend on the site, how specialized it is and so... tiqital het
Yes and no on that comment. I use ad tracking and I am surprised at how many people hit more than one ad. I guess they know where the back button is. I have removed one set of ads from my main site so we will see how it goes.
I doubt that the number of ads you ahve on your page will effect your eCPM. The bids are distributed evenly.
It is an interesting and valid point. If a site visitor has 15 seperate ads to look at and will only click one, unless there is huge seperation between the ad panels they are just as likely to click on the .02 ad as the .25. Which hurts. On my site I channel surfers from my main page to a page where they can see a larger image and then to a page which is nothing but AS and a list of lingerie stores. I can't violate the TOS by indicating the actual percentage click through but the ratio is 1:3:6. As the options narrow the likiehood of a click increases. But, as much to the point, the value of the click is renewed at each page: thus, if the bottom click on page one is 1 the top click on page 2 is 3. (And why, pray, does Google make me write this way.) The path through the site opens new opportunites for people to click on slightly higher paying keywords...this is a good thing.
Thats right. The probability is the same regardless of the number of ads on the page. Instead of one copy of the high paying ad there will be three, and so on. However, this is interesting though.
besides the ecpm being a fun stat to run on a per page or per advert basis, is it actually used for anything be google?
eCPM is probably close to being a key measure for Google. They would want to maximize the earning per impression not bid price on the clicks. If they can find keywords that get good clickthroughs and decent pay per click, I am sure that would weighted more heavily than high bid prices with very low clickthrough rates.
The only measure I pay attention to is the number of vistors to my site vs. the amount of money I get. I don't REALLY care about the CTR, ECPM, etc reported by google. That doesn't really matter. I just want to know how much $$$ I get for every visitor I can pull into my site. Gooogle doesn't give me that number. I need to look at my own stats and the earnings from google and other sources.