What functionality aspect does learnability aim to improve for users?

Learnability primarily focuses on enhancing a user's understanding of how to effectively use software. It pertains to how easily new users can grasp the functions and features of the application, allowing them to navigate and utilize it without extensive training or prior knowledge. The goal of improving learnability is to facilitate a smoother onboarding experience for users, so they can quickly comprehend the software's purpose and how to achieve their objectives within it.

While remembering commands is certainly important and relates to ease of use, it is a separate aspect that pertains more to memorization rather than immediate understanding. Speed of operation indeed impacts user experience but is not the defining feature of learnability. Lastly, security during usage addresses safeguarding against unauthorized access and data breaches, which is not related to how easily users can understand or learn the system's functionalities. Thus, the correct choice emphasizes the importance of understanding the application's purpose and capabilities in enhancing user experience.