How do I get free Garmin map updates?

I want to connect Garmin GPS device to my device to drive safely on any unidentified routes. Garmin GPS device is very important for every user, if they look for safe and happy journey. So I want to connect Garmin GPS to my device. But I have confusion that there are free Garmin map updates or not. I want to clear it correctly, so I want to know about update Garmin GPS . How to get free Garmin map updates? Can anyone suggest me about this concern?