OBB is called the “Opaque binary blob“.It is similar to Zip or Rar files, There are more files encrypted inside the OBB and only a specific app or game can only decrypt it.
Most high graphic rich games requires more space & a lot of them usually installs an OBB. For example, If you download a game via playstore. Usually you are downloading an apk file but when you start to install, it starts downloading “files needed”. That file is an OBB.
OBB MOD Tutorial:
Most Android games are modded via OBB, it means you must install the Modded OBB for the modification to work.
Note: The OBB Trick can be used for Android modded games that needed it to work.
1. Install the game
2. Rename the obb file
3. Uninstall the game
3. Rename obb file to its original name
4. Install modded apk