The applications that are part of the Windows Phone Marketplace go through an extensive certification process before they’re allowed on the application store. Microsoft is discussing matters related to app certification and the process itself.
Applications need to obey certain requirements which are clearly laid out for the app developers. Based on those, software is either certified and good to go or rejected. In the video below, Microsoft’s Steve Bell talks about the certifications process needed to guarantee a proper user experience as well as some of the most important reasons behind rejecting a software bit. Check it out below: