YSK by using the built in cross post function you can link viewers of one post to another, this is a useful to share and grow communities you think others may be interested in

Why YSK: By using the built in cross post function users will be shown a link to the same post on other communities. This lets users quickly see what people in other communities are saying and also has the potential to expose someone to something new. For community owners this is a great way to go about seeding discussion in new communities.

Example: https://lemmy.blahaj.zone/pictrs/image/cSbZl6adhb.png

Note: I only have experience with lemmy, if anybody else knows how it works on kbin please comment.