This is called the three four time signature. It tells you there are three beats in each measure. Three four time is also known as waltz time.
Before you play this song, listen to the recording and clap along with the notes, counting 1 2 3 1 2 3 as you go. Then play the song and tap your foot on each beat of the measure as you play. On the recording, there are six drumbeats to introduce songs in ^ time (two measures).
A dot after a half note means that you hold the note for three beats.
To play a dotted half strum tells you to play on the first beat and hold the chord for three beats.
This song contains a dotted half note in the final measure.
Strum Pattern