What is the adb sideload command used for?

It is used for sideloading a complete OTA package.

An OTA package file is an over-the-air (OTA) update that comprises wireless delivery of new software, firmware, or other data to mobile devices.

Do I need rooted device to use this command?

No, you do not need a rooted deice to use this command.

Home / ADB Commands /ADB-Sideload

System

ADB Debugging

Package Manager

Logcat

Wireless

File Manager

ScreenShot

Network

logcat

This command is used to sideload a given Over-the-air (OTA) package

Unzip a zip file

adb sideload

adb sideload path/to/OTA.zip

adb sideload /mnt/sdcard/Download/ota.zip

What is the adb sideload command used for?

It is used for sideloading a complete OTA package.
What is an OTA file?

An OTA package file is an over-the-air (OTA) update that comprises wireless delivery of new software, firmware, or other data to mobile devices.
Do I need rooted device to use this command?

No, you do not need a rooted deice to use this command.