Marketplace SEO differs slightly from ecommerce SEO insofar that depending on the site in question, it is often the vendors that have to optimise their own listings instead of the brand itself.
From an SEO standpoint, brands have to be smart in identifying templated trends to listings such as performance enhancements and internal linking optimisations. Alongside this, keeping on top of competitor activity and maintaining a user-friendly environment above all is paramount to revenue when it comes to marketplace SEO.