It allows you to teleport to any location you want, even in boss fights. You can get all the achievements by unlocking all the locations. You will be able to find the mod in your file explorer. The locations are all saved in your game. If you want to go to the location where the boss is, then you will have to go to your file explorer and find the "ELDEN Ring" folder. You will have to copy the two files there and paste it anywhere you want. Just don't lost it okay? You will have your save game if you go to the location where the boss is. You can also find the save game in your file explorer. You will have to paste it there.

If you want to get your original save game, then you will have to go to the folder where the save game is. There will be a file named "Steam_Autocloud.vdf". You will have to paste that file anywhere you want.