Google offers a feature to try various pictures and pick the best. You simply add different pictures and see what catches best with users. Google is using such optimization througout their business ever since their early days, check this CNET article for more info.
With such A/B-testing embedded in Google Play it is fairly straight forward to give different pictures a try. What can possibly be the impact of changing a few pictures, or is there an impact at all? I am not expecting much...
After a few days of testing the following impact is projected by Google Play:
- Using picture #3 instead of the current picture #1 would give a 20% download advandage (228 vs. 190)
- Using picture #2 instead of the current picture #1 would give a 36% download advandage (260 vs. 190)
Result: 30% increase in app downloads by using a better background image.