Whether your ads are from AdMob or another source, the focus of your app should always be on delivering the best possible user experience. Ads should be an integral part of your design process, rather than an afterthought so you can ensure that ads complement rather than compete with your content.
When choosing where to place your ad units, remember only one ad can be visible on the screen anytime. If your application involves playing a game with the controls at the bottom of the page then it is advisable you place the ad at the top. If your application carries a lot of article pages make sure you implement an ad unit on each of the article pages, sometimes these pages can be forgotten once the main pages are being served.
Take advantage of the Google certified ad networks feature within your AdMob account. Opting in to AdSense Backfill could help your fill rate improve substantially and therefore positively impact your earnings. Once you have the latest AdMob SDK implemented, you can access additional ad inventory from the Google Ad Network. Remember:
Increase competition by keeping your filter list small. Filtering decreases the number of ads that can appear, thereby decreasing your potential earnings as well. Blocking ad groups may have a negative revenue impact because blocked ads won't compete in the auction on your site, and therefore won't drive up potential earnings for that ad space.
It is important to keep in mind that users need time to interact with your content and the ad within your application. An ad that refreshes too often can adversely affect your CTR, by not giving users a chance to view the ad and decide if they are interested in clicking it. We would recommend setting your refresh rate between 45s - 60s and this can be managed within the AdMob interface.
If your app doesn't immediately make the top 50 rankings on an app marketplace, you have plenty of promotional options.
We hope these new resources help you make the most of AdMob.
