Why do people use theta?

Could you please elaborate on the reasons why individuals choose to utilize theta? I'm particularly interested in understanding its key benefits and the specific scenarios where it finds its most practical applications. Also, I'm curious about the challenges or limitations that theta might pose, and how users typically overcome them. Additionally, it would be helpful to know if there are any specific industries or use cases where theta is gaining significant traction. Could you provide insights into these aspects, please?