Map is an alternate list layout. It displays each list item as a location on a map, as well as an optional list view that people can click in the bottom right of the map.
Simply change the list layout of your tab to Map and then configure the view's properties to show the data in the way you want.
If you see map pins in the wrong locations, this is because you picked the wrong Address property (maybe you chose a column containing place names, not addresses?); or your addresses are incomplete or ambiguous.
You can ensure the correct pin location and make your app faster by providing coordinates instead of an address. For example, the Eiffel Tower is located at both:
When your sheet contains addresses, your app must lookup the coordinate before placing the pin on the map in a process called 'geocoding'. This slows your app slightly and also can be expensive. If you use coordinates, however, the pin will be placed accurately, immediately, and without cost.
To lookup a coordinate, find the desired place in Google Maps and copy the coordinate from the URL. The format is two decimal numbers, separated by a comma. Sometimes the numbers are negative (e.g. 37.804884,-122.468803) so be sure to include the minus symbol, but do not include the @ or / symbols:
You can simply use coordinates as address values, and you can mix addresses and coordinates in the same column.