An augmented chord is indicated by a "+" or "aug" written after the letter name, e.g. C+ or C aug. A full summary of augmented chord shapes can be found in the chord chart at the end of this book.
The play the G augmented chord use the thumb, third and fifth fingers of the left hand. Move your hand towards the back of the keys to make this chord easier to play.
On the recording there are three beats to introduce this song.