What is SNS protocol?

Could you please elaborate on what the SNS protocol stands for in the context of cryptocurrency and finance? Is it a specific type of network protocol designed for social networking services, or does it have a different meaning and application within the industry? How does the SNS protocol work, and what benefits does it offer to users and participants in the cryptocurrency ecosystem? I'm particularly interested in understanding its unique features and how it differs from other protocols commonly used in the field.