Sometimes when you play a chord, instead of playing all three notes together, you play the lowest note of the chord shape (chord fingering), followed by the other two notes of the chord. This is called a broken chord.
In this song, the left hand plays C, F and G7 as broken chords. Practice the left hand by itself before adding the melody.
Broken chords also sound good in ^ time. This time, the lowest note of the chord is played on the first beat and the upper notes of the chord are played on the second and third beats. Once again, practice the left hand by itself before adding the melody.