Helps OpenStreetMap contributors to easily switch between different maps and analysis tools from the community.
Switch from a known map website to another to see different visualizations of the same area.
As an example, go to the https://www.openstreetmap.org/ map and click on this extensions' menu button. A dropdown menu will appear allowing you to switch to other map visualizations using the same coordinates.
And if you are an OpenStreetMap Contributor, you can switch to one of the community's tools to analyze the selected element (node, way, relation or changeset).