There is no definitive answer to this question, as it depends on the blog and the items being sold. However, most blogs allow users to sell items through the blog’s own interface or through third-party vendors.
If you are selling items through your blog’s own interface, you will need to set up a store and create an account with the blog’s vendor. You will also need to provide the vendor with your store’s URL and information about your products, such as product descriptions and images.
If you are selling items through a third-party vendor, you will need to contact the vendor and set up an account. The vendor will then provide you with an order form and other information about how to sell your products on the blog.