A look at Pinterest's efforts to position itself as the platform at the top of the purchasing funnel, challenges with the "buy button", ads, and visual search (Anna Hensel/Digiday)

Anna Hensel / Digiday:
A look at Pinterest's efforts to position itself as the platform at the top of the purchasing funnel, challenges with the “buy button”, ads, and visual search  —  Pinterest's imminent IPO raises new questions about how big of a role the platform will play in the future of social commerce.