This is where you decide which Authoriti partner you are authorizing to do something. When you plan to give your authorization to someone who will present it on your behalf, we want to make sure it can only be used where you want.
If authorizing a company to release your data to a 3rd party, use this to pick the company that is allowed to release it. That keeps the 3rd party from using your authorization anywhere else.
If you are authorizing a insurance claim, select the insurer that this authorization may be presented to by the 3rd party who wishes to be paid. For example, a doctors office might take your authorization and include it on their claim to your insurance company. This limits the claim to a specific insurer, preventing the billing at other insurers