In social media, "DM" stands for "Direct Message". It is a private mode of communication between social media users, where only the sender and recipient can see the content. DMs allow users to chat and share content one-on-one, instead of a public post that can be seen by all followers. Direct messaging is available on various social media platforms like Instagram, Facebook, Twitter, and TikTok. The restrictions for messages vary for each platform. For instance, on Facebook, users must "like" a page before you send them a DM, while on Instagram, DMs can be sent to up to 15 people, and Twitter allows for DMs to up to 50 people and requires a "follow". DMs are usually considered more private than public posts and are typically used for personal or sensitive conversations. Companies use DMs to build relationships with customers, improve customer engagement, and exchange private information.