I first found it while looking to degoogle my electronics. Osmand was recommended to replace google’s maps. Since Osmand is based on the OSM data, I realized that the imperfections that I noticed, such as being routed to the wrong side of a property, could be corrected by me.
I decided to look into it more deeply which lead me to the StreetComplete app, and the rest is history.
What I like the most about it is the ability to be as detailed as I’m feeling on that day. As a rule I like things that are free-form and leave room for creativity. I have the option in OSM to survey every square inch of my local parks, and subsequently upload that information… or I can kick back and draw squares based on aerial photos.
I also coincidentally happened to acquire a touch-screen laptop with a stylus before I started editing with the browser-based tools.
So far I’ve had a lot of fun walking around my local neighborhood and community and adding the local businesses, removing redundancies, updating things to account for construction, and so forth.