Recovery, in Android, refers to the bootable partition, in which the recovery console is installed.
It contains tools to help repair your installations as well as install official OS updates by using a combination of key presses or instructions from a command line sometimes.
Android is open, meaning the recovery source code is available, so that building a customized ROM is relatively easy.
1. First step in getting to recovery mode is making sure your phone is switched off.
2. Then afterwaiting few seconds press and hold power button with volume down button.
3. Hold those buttons untill your screen will start showing LG logo.
4. Wait a moment and you will get to recovery mode, good job!
5. If you wan to know how to navigate then it's: Power button for selecting and Volume button to go up and down.