As a largest IT giant and large use of android system, google is now more strict with developer to maintain the good relation with their user. Now a day App submission from Google play developer console is very hard to come live in play store.
Google now manually review every app, submitted by
developer whether it is new or update of existing app. Google see each and every details of app about privacy policy, ip infringment and many other reason given in their privacy policy site.
One thing is very bad about Google play store is that they never said specific reason if they reject or suspend the app which create very bad for developers, while one good thing is that it just take two to three hours for app to live in Google play store, which mean that submission process is very fast relative to apple’s app store and windows phone store.
Google 
