@Delawarekathy The Community Firehose - is literally everything anyone posts unless you have something specifically filtered out. Notifications - tells you if someone has favorited a post / comment you have made or if they boosted something you posted. My Friends - is the column most like your old Twitter feed. My Friends is where you see things posted by people you follow. If you boost something that someone else posts it will show up in your friends "My Friends" column.