I have been confused from a long time on what types of contents were called Adult or Mature contents on Google Adsense. I wanted to know is there any kind of measurements on that which is clearly defined on adsense or how can I clearly know if any pictures or texts we were going to place on our site is Adult contents or not. So I asked the same question to the Adsense support team and below is the reply from them:

Google is rated as #1 Search Engine worldwide. Besides Search Engine there are lots of services that they offer for the users. Some of the popular services includes Google Search, Google Co-op, Google Earth, Google Maps, Picasa, Gmail, Google Adsense, Google Adwords, Blogger, Orkut, YouTube, Google Apps etc. Well I am not on the way of either you are familiar with above services or not, but here I am going to give info regarding Google Apps.