How this works: Click "Find me" and allow your phone to use the geolocation services of your phone. It should get you close to where you're standing.
Once close, use the satellite imagery to get closer, then touch the map. That will place a blue marker and you'll see the latitude and longitude of the marker appear.
If the marker is in the wrong spot, click it and click "Remove me" in the popup and the map and location information will be erased.
Once you have the correct spot, click on the "Select" button and the text will be selected for you (Note: On some mobile devices, you'll need to click and hold on the text after you've clicked the button for the text to be selected.