instances: can also be called servers, anyone can host a lemmy code.
community: synonym for subreddit
federation: instances can federate (connect) to each other and their users can interact with the connected instances, they can also defederate (disconnect).
Short version:
lemmy: some sort of opensource type of Reddit
instances: can also be called servers, anyone can host a lemmy code.
community: synonym for subreddit
federation: instances can federate (connect) to each other and their users can interact with the connected instances, they can also defederate (disconnect).