Recovery mod is an inbuilt repair tool. it helps you

  • to reset your mobile when you have forgot your mobile password.
  • Clear caches in offline mode.
  • Clear delvik cache in offline mode.
  • Clear cookies in offline mode.
these are the use of default or inbuilt recovery mode. 

there are two custom recovery

  1. Clock world Recovery ( CWR)
  2. TeamWin Recovery Project (TWRP)

features of custom recovery (Clock world recovery):-

  • Install update from zip.
  • install update from sideload
  • partition SD card.
  • Mount drives.
  • Mount USB drives.
  • fix permissions.

Features of TeamWin Recovery Project 

  • flash multiple files together
  • touch is working in this recovery