Feel free to put on the map the modifications you would like to see on OpenStreetMap (name of a street, incorrect junction, amenity, etc.)
Do NOT use licensed data like paper maps, Google Maps, etc. Use only your knowledge of the reality or public domain data.
According to the OpenStreetMap license, the data that you add on the map will be licensed CC BY-SA.
Use the button (on the top of the map) to add a point.