What is the main purpose of UX?

Can you clarify for me the main purpose of UX, or user experience? Is it primarily focused on enhancing the overall satisfaction and enjoyment of users when interacting with a product, service, or system? Or does it go beyond that, aiming to optimize the usability, accessibility, and effectiveness of the user interface to improve the overall experience? Understanding the main purpose of UX is crucial in designing and developing products that meet the needs and expectations of users.