At a Pinterest event Thursday evening in San Francisco, CEO Ben Silbermann announced changes to the photo-based social media platform to help improve users’ ability to discover content. Silbermann introduced three key changes to the platform — most notably, a mobile-first Guided Search system that allows users to swipe through new categories and narrow down search terms visually to be rolled out today. “The one truism about Pinterest is the more people join, the more people discover, they have diverse interests and they should be able to enjoy them.” Silbermann said that the search system was designed for mobile — a growing portion of Pinterest’s business that the company also sees as the gateway to international penetration.