Welcome, you can create maps which show where you have visited via the 'World' and 'Continents' options which can be accessed via the menu above.
Currently only a limited number of continents are available to create maps with. Below are some example maps.
A Europe map with the 'Flag Style' selected, showing Germany, Italy, Spain and the United Kingdom marked as visited:
A World map with the 'Simple Style' selected, showing France, India, Spain and the United States marked as selected/visited:
North America Map
A North America map with the 'Flag Style' selected, showing just Canada and Mexico as visited:
South America Map
A South America map with the 'Simple Style' selected, with Argentina and Brazil marked as visited: