Pinterest is a visual content curation platform that allows users to organize and share images and videos from around the web. It has grown rapidly since launching in 2010, driven in large part by female users ages 25-44 interested in areas like home decor and fashion. Many brands are using Pinterest successfully to showcase their products, drive traffic to their websites, and engage with customers in a visual way. The guide provides tips on how to make the most of Pinterest through strategies like creating collaborative boards, pinning content directly from mobile apps, and integrating Pinterest sharing buttons on websites.