FediTips has moved!Traditionally relays are much more indiscriminate, pushing posts that are visible to their server to other servers which subscribe to their relay.
FediBuzz is newer and much more specific.
I think the idea is that it's feeding specific content to you as boosts, because boosts are one of the things that make a server notice posts.
Other people on your server will then be able to discover that post through hashtag searches etc, regardless of how your server ended up noticing it.
All GNU social JP content and data are available under the