Do I have to physically be in front of a home to "snap" it?

Within the app when you click on the camera icon you can put your phone in "stealth" mode. Stealth mode lets you take a picture even when you are not right in front of a house. It provides an aerial view of homes in the area from which you can choose a property as your snap. This only works for nearby houses to your current location.

If you are interested in homes not in your immediate location you would actually have to take a "snap" of the property while you are standing in front of it.