Forum Moderators: martinibuster
I am still not sure the reasons for the following and if anyone knows please do tell those of us who are unclear.
My least visited pages that get single digit impressions and single digit clicks (which makes for high two to three digit CTR, have huge three digit (dollars) eCPMs. My most visited pages, are usually into the double dollar digits with double digit percentages for CTR. WHY?
I have noticed that during the earlier part of the day the eCPM will be a good amount of money but the later in the day it goes, the lower it goes, even when the percentage of CTR is the same.
What I do not understand is why the eCPM goes down during the day? I have tried a couple of experiments where I remove the widesky with #*$!xxx title color, and replace the same exact widesky in the same exact place but with a slightly different xxxxxx color, and the CTR will be very close (as the other title color) but the eCPM is higher. So technically, if one had time to do this all day long, if you changed just a little something about your ad like the title color every couple of hours, your overall eCPM for the days average would be higher. I do not have time to do that, but through some experimenting this is what I came up with. Anyone else have similar experiences?
What you earn per click varies on a whole host of factors incuding smart pricing. For those that don't know, this is calculated by a Google employee standing in the car park waving a bit of wet seaweed in the air and thinking of a random number. It's true! Just look up Google campus on Google earth - you can just spot the guy;)
The number of impressions you will get, and the number of clicks you will get obviously vary according to other factors.
My least visited pages that get single digit impressions and single digit clicks (which makes for high two to three digit CTR, have huge three digit (dollars) eCPMs. My most visited pages, are usually into the double dollar digits with double digit percentages for CTR. WHY?
This is pretty normal for me. eCPM has it's uses, but to be honest you should be looking at ALL of the metrics available to get an overall view - not just the one.
eCPM is calculated by (earnings divided by impressions)*1000. Therefore the figure is likely to be high if you have few impressions and one good click on a page. When you get higher impressions and a better average of clicks and earnings then the eCPM figure stabilises.
Have you tried comparing EPC on these pages at all?
Basically you can't control variations in eCPM by the hour. We don't have any control over many of the factors that affect this. The best thing to do IMHO is to work out what gives you the best return overall and just ride along on the Madsense roller-coaster.
