>If you endorse a product through social media, your endorsement
message should make it obvious when you have a relationship
(“material connection”) with the brand. A “material connection” to
the brand includes a personal, family, or employment relationship or
a financial relationship – such as the brand paying you or giving you
free or discounted products or services.
From the FTC
>If you endorse a product through social media, your endorsement message should make it obvious when you have a relationship (“material connection”) with the brand. A “material connection” to the brand includes a personal, family, or employment relationship or a financial relationship – such as the brand paying you or giving you free or discounted products or services.
https://www.ftc.gov/system/files/documents/plain-language/10...