You must prepare yourself before performing a reset iPad to factory settings so that you don't lose data and face any inconvenience after that. At the very least, you should save a backup of all your data to iCloud or to a PC, so that later you can easily restore your contacts, pictures, and applications. Also, if you have the Find My iPad feature turned on, then make sure that you sign out of your Apple ID so that you do not encounter activation lock problems. By the way, don't forget your Apple ID password because you will be required to enter it to confirm the reset. Finally, after having made all the necessary arrangements, you may follow the path of Settings General Transfer or Reset iPad Erase All Content and Settings to finish the reset process.