This map is using tiles served by the OpenStreetMap project.
For information on their tile usage policy see: https://operations.osmfoundation.org/policies/tiles/
Advantages:
- Potentially free of cost, for light usage.
- World wide coverage.
Disadvantages:
- Styling limited to the raster (pre-rendered) tiles provided by OpenStreetMap.
This demo is using Maplibre to display the map.