Google has revealed that it started using a team of app reviewers to enforce its developer policies several months ago, in an effort to catch apps in violation of its policies earlier.
Despite the change, Google said there has been "no noticeable change" for developers.
"We value the rapid innovation and iteration that is unique to Google Play, and will continue to help developers get their products to market within a matter of hours after submission, rather than days or weeks," the company said in a blog post.
Beginning on Tuesday, Google said it will introduce an age-based rating system within its Play store, which will appear to consumers in the coming weeks. The ratings will include official rating labels for territories such as Australia and North America, where available, and will otherwise show a "generic age-based" rating.
App developers will need to sign into their Play developer console to complete a ratings questionnaire for each of their existing apps; otherwise, Google said the apps will be "unrated" and risk being blocked in particular areas or for specific users.
From May, all new apps and updates will need to have a completed rating questionnaire in order to be published on Android's official app store.
In recent days, Google has released Android 5.1 Lollipop, which includes a fix for a severe memory leak issue. However, due to the nature of the Android release process involving handset manufacturers and carriers, users are set for another long wait before it will appear on their devices.