About the Csus2 chord
To play C suspended 2nd, use the first shape above. Place your index finger on the 2nd fret of the C string, your middle finger on the 3rd fret of the E string, and your ring finger on the 3rd fret of the A string. Leave the G string open. Strum all four strings and check that each one rings cleanly.
Root
C
Quality
Suspended 2nd
Notes
C · D · G
How the Csus2 chord works
C
Root(1)
The home note. It gives the chord its name.
D
Major second(2)
An open-sounding second that replaces the third.
G
Perfect fifth(5)
Adds strength and stability.