Newbie Question: Best platforms to install on Android SDK

This might sound like a strange question.

Just installed and connected Appium to Android Studio.

Just wondering what are the best sdk platforms to install for a good coverage of automation.

Hope this question make sense.

our company does latest android version and minus one. An example would be android 6 and 5.1.1.

Also check with your company and see if they have any analytics on your user install base.

cool. Thanks so much