Pinterest is a visual discovery engine where users can find ideas like recipes, home and style inspiration, and more. Users create and organize boards where they can pin content they find on the platform or from across the internet, facilitating easy access and categorization. Pinterest's algorithm recommends personalized content based on users' past activities and preferences, enhancing discovery and engagement. The app also serves as a powerful tool for brands and advertisers to reach audiences through targeted ads and promoted pins, driving both user inspiration and business opportunities.