This is a half note strum. It lasts for two beats. There are two half note strums in one bar of * time.
This is a quarter note strum. It lasts for one beat. There are four quarter note strums in one bar of * time.
This is a pair of eighth note strums. Each strum lasts for half a beat. There are eight eighth note strums in one bar of * time. Play the larger downward strum louder.
This is a group of sixteenth note strums. Each strum lasts for one quarter of a beat. There are sixteen sixteenth note strums in one bar of * time. Play the larger downward strum louder.
This is a group of three eighth note triplet strums. Each strum in the group lasts for one third of a beat. There are twelve eighth note triplet strums in one bar of * time. Play the larger downward strum louder.
A broken strum symbol indicates that the strings are not to be strummed.