Behind every sponsored post or paid ad is a product—and getting access to that product is a key part of an advertiser’s strategy. Whether it’s through affiliate programs, direct brand partnerships, dropshipping models, or product seeding, online advertisers use a variety of methods to source items worth promoting. Understanding how these acquisition channels work isn’t just helpful—it’s essential for anyone looking to scale a performance marketing or influencer-based business. In this article, we’ll break down the most common ways advertisers get products, the pros and cons of each method, and how to choose the right one for your niche or platform.