It is a collection of "persuasive" maps, that is, of maps designed primarily to influence opinions and beliefs instead of communicating geographic information. They use various tools and strategies (unusual projections and range of colors, partial selections of information, imaginative illustrations, allegories, satires and even intentional deceptions) to advance a particular cause or point of view.
Cartography is exposed from the 17th century to the present. Many of the works focus on historical perspectives on issues that are still relevant today, as is the case with immigration policy and gerrymandering strategies. Others seek to promote social change, the promotion of products and places or send notices about imaginary futures.
You can appreciate it by going around the virtual exhibition.