How do you determine the focus of a commercial vs. a Psa?

The focus of a commercial vs. a Psa is given below

Explanation:

1.A commercial is an advertisement that airs for a specific amount of time and is paid for by a company. It is that company's intention to invest in the ad to entice people to buy. Public Service Announcements or PSA's on the other hand, are run on TV for free.

2.A Public Service Announcement (PSA) is a free “commercial” for a non-profit organization. It is aired voluntary by individual radio and/or TV stations. But To The Audience To the audience, a PSA is just another commercial.

3.A public service announcement (PSA) is a short, community-oriented message that radio stations air at no cost in order to fulfill their obligation to serve the public interest. ... Radio stations receive PSAs as audio files – typically recorded as :30 or :60-second messages.

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