PSA and Commercials

The major difference between a commercial and a PSA is:
•Commercials is trying to persuades you to buy something.
•PSAs persuades people to do something, or to warns.
The 3 things that makes a PSA and commercial is they are unique, funny, and they have some very good song in their commercial.
The 2 things that are important when trying to make a commercial or a PSA interesting when it is played on the radio is, they talk and describe a lots, and they add a lot of music and sound effects.