What does advertice for free mean?

Question

What does advertice for free mean?

Answer 1

It means you don't have to pay for it.

Answer 2

I assume you mean "advertise for free".

The word "advertise" means to place a sign about your product or service in a public place, or list the information in a publication, where it can be seen by potential consumers, to try to cause them to be interested in the purchase of your product or service. (My own definition).

The word "free" in this scenario means "without cost".

So, the phrase, "advertise for free", means exactly that.