As easy as that your contact will be able to see where to pick, meet or just know where you are.
You can also select a contact as favorite with a preset text, so when you press send without any other data your current location will be sent immediately to that contact. Very useful when you normally need a ride from the spouse of family at different locations.
The location you send can be your present location or somewhere you'll be in the future, you just need to click on the map and that's it!
Note: The sms is treated as any other sms you send, so it might be normally charged by it by your provider depending on your plan.