It’s a tool that basically just allows you to download a list of communities you’re subscribed to, which is good to have as a backup if your instance ever goes down.
There’s also an upload option for if you make a new account someplace else, which can take that backup of your communities and subscribe the new account to all of them automatically, rather than starting from scratch.
Lemmy Account Settings Instance Migrator
It’s a tool that basically just allows you to download a list of communities you’re subscribed to, which is good to have as a backup if your instance ever goes down.
There’s also an upload option for if you make a new account someplace else, which can take that backup of your communities and subscribe the new account to all of them automatically, rather than starting from scratch.