The article discusses StreetComplete, an app that allows users to contribute to OpenStreetMap by completing small tasks, such as labeling and adding missing data. The app is designed to be beginner-friendly and has a well-done UI. Users can contribute to the map by completing quests, which can be a fun and engaging way to improve the accuracy of the map. The app has various features, including the ability to add simple roads and footpaths, and has a companion app called StreetMeasure that uses Google's AR measuring capability.