Agents who earn over $100k have an active social media presence like Instagram where they can share photos and videos to build relationships with past clients, which leads to more referrals. Instagram is a popular platform with over 400 million members, mostly women, who use it on mobile phones. Agents should post interesting behind-the-scenes content using hashtags to engage clients and other professionals, and use apps like PicStitch and Snapseed to create high-quality posts that showcase properties and build their brand. Cross-posting to other channels like Facebook can further expand an agent's reach.