Gifting
Gifting is providing free product without a fee, hoping for organic coverage. It works as an open invitation with no obligations; the moment deliverables or deadlines attach, it is a commissioned job that carries a fee. In most markets, gifted coverage with any expectation of posts still legally requires an ad disclosure.
Worked example
Twenty press samples sent with a note and no conditions — some recipients post, none must, and those who post with an arrangement label it.
Related: Brand deal · Ad disclosure
Full context in the guides, or measure it yourself with the free tools.