Open Source
A couple decades ago, almost every software package was developed within one company, then sold to whoever wanted to use it. Open source is different - it means a software or app that is built, developed and continuously updated by the users. OpenStreetMap, for example, is an alternative to Google Maps that is constantly updated by whoever wants to use it. If you use OpenStreetMap and see that they’re missing a street or business, you just add it yourself. Open source platforms are free to use.