Fixing an #OpenStreetMap note and then closing the note is deeply satisfying! And OSM notes are also the easiest way for anyone to improve the map. You don't need to know anything about tagging schemas, editors, whatever. Just provide a natural language description, and maybe add a photo.
I should add: To get notified of any new notes or note activity in my area, I am subscribed to an #RSS feed: https://wiki.openstreetmap.org/wiki/Notes#Generating_a_custom_RSS_feed
Notes - OpenStreetMap Wiki

@haraldkliems I had no idea this was a thing! Awesome! Thanks for sharing!
@kevin I only learned about it last summer on the OSMUS Slack and it's been great!