The classical User Story format is a way to express three different elements: the who, the what, and the why.
So to improve the your user story, you need to think about why a customer would care to see stores on the map. The purpose is obviously not just to see them on the map, the purpose is to do something with that information: go shopping, waste time while waiting to do something else, spend money on things that you need or bring joy, or whatever reason people have to go shopping. Just pick one that makes the most sense.
The important part here is not necessarily to write the perfect user story title, but to have the conversation about the "why". If you can't find a "why", the problem won't be that you can't improve the title of the user story, but the fact that you might build an useless feature that will go unused or brings no value to customers or to your business.
Note that you don't have to be a slave to this format and it's not mandatory to use. You are not breaking any Agile law by not respecting it. See more details on this post by Mike Cohn: Why the Three-Part User Story Template Works So Well.