In addition to picking the best niche for adsense, you also have options as to which ad type to show. The options are:
Google offers several different options for the varieties of ad that may appear on your pages and in your reports.
Here’s what you may see:
- Text (includes text ads that have been rendered in the “display-like” magazine-style format)
- Rich media
- Animated image
- Link units
In my own experiments (2 years),
CTR increased after adding Link units – BUT CPC fell with the addition of Link Units.
For best combination of CTR and CPC mix Native Text & Image Ads (specifically Large Rectangle and Responsive) with 3 Link Ads