Google has added a global content rating system to help developers target their audience. The content rating will help a great deal, especially for those targeting certain audiences.

Additionally, the App review process will give developers a better insight into what's gone wrong.

I've not yet seen this, so if you've any feedback, let me know.

Today we’re introducing a new age-based rating system for apps and games on Google Play. We know that people in different countries have different ideas about what content is appropriate for kids, teens and adults, so today’s announcement will help developers better label their apps for the right audience. Google Play Gets Developer and User Improvements [android-developers.blogspot.com]

To help maintain your apps’ availability on Google Play, sign in to the Developer Console and complete the new rating questionnaire for each of your apps. Apps without a completed rating questionnaire will be marked as “Unrated” and may be blocked in certain territories or for specific users. Starting in May, all new apps and updates to existing apps will require a completed questionnaire before they can be published on Google Play.

we’ve also rolled out improvements to the way we handle publishing status. Developers now have more insight into why apps are rejected or suspended, and they can easily fix and resubmit their apps for minor policy violations.