It primarily originates from the 'back' button on digital devices. Because of this, it can be used wittily, like 'Never mind what I just said! 🔙,' after sending a message by mistake.

It's sometimes used in 'Throwback' posts reminiscing about the past, and it's also useful for announcing your physical location, like 'On my way home 🔙.' Its meaning has expanded beyond physical direction to abstractly represent rewinding time or the flow of a conversation.