Pinterest is a visual platform, so developing helpful, beautiful, actionable content is the single biggest thing you can do to drive traffic and engagement to your profile. I would suggest you read our article focused on the 5 main tips on how to grow your audience with your content on Pinterest.
Regarding the Paid Partnership, is a feature that lets you tag a brand you have a sponsorship or branded content relationship with. The paid partnership tool is a way to disclose any paid branded relationships directly in your Pins! Check out our Help Center article for more information on how to use the Paid Partnership tool.