To reset Apple ID, you first need to know what is Apple ID, to begin with. So let me start by answering that question for the sake of those who may be new to the world of Apple. If you already know what it is, you can feel free to skip this part.
Apple ID is an all-in-one account that is used to log into all the different accounts provided by Apple, such as iTunes, iCloud, Apple Store, etc, across all the different Apple platforms, be it iPad, iPod, iPhone, or a Mac. The Apple ID is determined using the customer's email address from any email provider.