The paid partnership tool is a feature that lets you tag a brand you have a sponsorship or branded content relationship with. Note that you don't need to have a specific amount of followers in order to use it.
The paid partnership tool is a way to disclose any paid branded relationships directly in your Pins!
Before using this tool, make sure that the brand you are tagging is on Pinterest. Note that these partnerships are already established by the creator and brand outside of the platform.
Check out our Help Center article for more information on how to use the Paid Partnership tool.