What is beam used for?

Could you kindly explain, in plain English, what exactly Beam is utilized for? I'm interested in understanding its applications and functionalities within the realm of cryptocurrency and finance. Would it be accurate to say that Beam serves as a medium for secure transactions? Or does it possess additional uses that I'm perhaps not aware of? Could you also elaborate on its unique features and how it differs from other cryptocurrencies? I'm eager to learn more about this intriguing topic.