Finding local recommended tradespeople, either by looking at previous posts or by asking on local groups,, keeping in touch with distant relatives and sharing photos and videos, finding local things for sale (bit of a minefield tbh but I have picked up some good buys), free and VERY effective advertising for my daughter's dog grooming business, keeping up with local campaign groups, getting reviews for local pubs, restaurants and other local businesses, often with better information, photos etc than any other source (for many businesses now, their sole website is a FaceBook page). Currently, my local group is posting updates on flooding and which roads are impassible. That enough for you?