What is BTSE?

Could you please explain to me what BTSE stands for and what it is exactly? As someone who's new to the world of cryptocurrency, I'm curious to learn more about this platform and its unique offerings. Is it a cryptocurrency exchange? What sets it apart from other exchanges in the market? Are there any specific features or services that BTSE provides that are particularly noteworthy? Additionally, how does it ensure the security and safety of its users' funds and transactions? I'd appreciate any insights you can provide on this topic.