@Froogal pretty sure that has to do with federation, and toggling it limits the boost's visibility to your instance only

@Froogal It must be an option of your server. On mine I don't see nothing like that (or perhaps I didn't noticed)?
I guess restrict the visibility only to your istance than make it global.

@Froogal Some instances allow you to restrict visibility of the things you post and boost to only other users on your instance. If you boosted that post with the Local toggle enabled, it would make it so that only other users on derg.social could see that you boosted that post.