Bloggers who receive free or gifted products from brands or manufacturers should make sure to follow some “best practices” to ensure they do not get penalized by Google.
In short, reports Search Engine Land, “Google clearly has seen bloggers write about products and link to the supplier of the products in exchange for the free product.”
When you are given a product for free, and you write about that product, Google wants you to do three things, including disclose that you are writing the content because the company gave you the product for free. Google said, “Users want to know when they’re viewing sponsored content,” and sometimes there is a legal requirement to do so.
The Search Engine Land article has information on the three “best practices.”