What Is Custom Recovery :- (CWM,TWRP,CARVIL,PHILZ) Code:
Custom Recovery is a replacement of Stock recovery for Android devices
It Can Flash Custom Roms In Zip formats and its made by android developers and modders. it has many cool features that is not available in stock recovery .
It can take whole flash backup of ur android device and can restore also if any thing goes wrong in ur android device related to any software issue.
it can Apply Tweaks ,mods Ota Updates Also which is in Zip format