Tahj Mowry primarily uses Instagram to interact with fans due to its visual nature, allowing him to share photos, videos, and stories that showcase his personality and projects. The platform's interactive features, such as comments and direct messaging, facilitate real-time engagement with his audience, making it a preferred choice for celebrities looking to connect with fans. Instagram's popularity among younger demographics also aligns with Mowry's fan base, enhancing his ability to reach and engage with them effectively.