All 3 are pretty active, although the bottom one is a bot community hat automatically finds rising and popular communities in the fediverse. The top two are similar, but one seems to be about just generally bringing attention to communities people want more users in (community promo), and the other is about advertising newly created or revived communities (new communities).

I personally subscribe to all 3, but I’m always trying to find new communities to add to my home feed. I prefer using that over All or Local.