What is the cheapest way of advertising a product

[Sincerem]

One of the cheapest ways to promote your product is through free social media. You can use WhatsApp, especially WhatsApp Status. It works. You can also find good friends on Facebook and promote your products there.

Social media might be a cheaper way of advertising a product on the internet freely but at the same time all the advertising process will be done by you which indirectly will make it a bit stressful.