Google has several brands of advertising product, with different type of target audience.
AdWord
It's target for bsuiness who want to be place advertisement and be exposure on the Internet.
They pay for Gogole and let their Ads be show up on the relative site. As a developer, its not my job, but my "Boss" job.
AdSense
If you own a web site / forum / blog and want to get some money, AdSense would be your choice. With large advertiser based, it provided localized advertisement network, in which the Ad it show on your site will could match the taste of your daily visitors.
However, a unapproved AdSense, I can tell you that its not easy to get a register AdSense in these years. First your content provided should be "clear". Any immortal content on your site, or misbehavior that affected your Ads click rate will probably lead your account disabled. AdSense application is not easy to get approved.
With the content of this Blog provided today (~ 20 post), Google AdSense defined it as "insufficient content" and will simply reject my application. As a developer, its also not the things for me. It takes large amount of time and effort to maintenance a webpage / Blog / forum with quality content, but what I am focusing is my Mobile Apps.
AdMob
If you have developed a android apps and published to Google Play, like me, and wanted share your products with Ads, it would be much easier to apply (vs AdSense). If you have a published apps on Google Play, can get your AdMob A/C on the fly once your application submitted. Google also provided a tidy library JAR and allow you to implement your the Ads to your apps easily.
Conclusion
IF you have a apps on Google play and want to get some cash, Apply AdMob now, and start your Ads business.
| Account | who should apply? | Cash flow | What you need? |
| AdSense | Web site owner / Blogger | get paid | An operational website / Blog |
| AdMob | Mobile App Developer | get paid | An apps published on Google Play (or Apps Store) |
| AdWord | Marketing people | Pay | Cash |
