If you want to become an affiliate marketer, you're going to need an audience. You can start by promoting your products in online discussion communities relevant to what you're promoting, like Reddit or 4Chan, but check each website's policies first to see if they prohibit affiliate links. If they don't, start building trust within these groups by contributing often, then post your links! Alternatively, you could also try your hand at writing. E-books and online articles are both great places to promote products!
The seller, whether a solo entrepreneur or large enterprise, is a vendor, merchant, product creator, or retailer with a product to market. The product can be a physical object, like household goods, or a service, like makeup tutorials. Also known as the brand, the seller does not need to be actively involved in the marketing, but they may also be the advertiser and profit from the revenue sharing associated with affiliate marketing.