Forum Moderators: martinibuster
I currently have mostly 300x250 size "text_image" ads on my site (was recommeded by a google rep to use this format via some email discussions when they said they would include my site in their "custom placement packs").
For the first month after implementing this size, my CPC was great - the first day of following month, my CPC dropped to half what they were. My guess is that my site was promoted by this "custom placement packs" and some companies advertised with me for 1 month, then left.
Now I'm trying to decide whether to move away from these 300x250 ads seeing they are paying lower than 3 months ago when I was using a 120x600 format.
SOOooo my questions:
- in general, which sizes pay better for both text and image formats
- do you think I should hold out another few months and see if my CPC climbs back up?
Anyone have thoughts on this?
according to many suggestions (another threads) it would be best to run experiment for longer period, at least a month.
It depends on how much traffic you get. Personally I would not run a test more than month if I had 500,000 visitors monthly.
I've heard this from google also - but according to my past personal experiences, this is not the case. My "guess" for the reason that google promote this format is that it's the format that accepts video ads - which google are trying to push because it's what makes high revenue for them (and low revenue for the publishers).
I'm curious to just hear personal experiences from others who have run similar tests - perhaps in my case that format just doesn't suit my design as well as tower ads (120x600). If anyone else has run tests comparing sizes I'd like to hear.
