Hi Like many of you I mostly displayed Text Ads for blending and also because I thought clicks on text ads earn more (which they do because Image Ads are CPM Ads!) HOWEVER after receiving a google message telling me that my webpage does not use its full potential by not using image ads I started to rethink my approach. What does google adsense support says about image ads? so far so good. Not much info here to help me/us decide what approach we should take. Inside Adwords however offers this explanation: This does make sense and clarifies a widely spread misunderstanding. Image ADs are CPM based and you don't earn anything when users click on them. However you earn each time an image ad is displayed. The lower your CTR is the more valuable CPM based ads are. I for myself decided to activate text and image ads on all my ad spots on my main site to see if it will increase my earnings over time. Because I have a high eCPM on my major earning ad spot I doubt there will be much image ads to be served on that specific spot but most other ad spots should receive increased earnings over time. What are your thoughts? StarBuG
Text ads always. Experimented with image ads some time back, but they just didn't work for me (got fewer clicks). However, I know that my websites in general are designed primarily with adsense text ads in mind. Other peoples sites might work better with image ads. But the problem with image ads in general is that you don't know what type you're going to get. You don't have the same formating options that's available with text ads and you might be get image ads that clash terribly with your website.
That's depend upon website contents. If a site having text then prefer text ads otherwise use images ads if having more images on site. I suggest you to use both and check the results