Usability Mean

Usability is the degree of ease with which products such as software and Web applications can be used to achieve required goals effectively and efficiently. Usability assesses the level of difficulty involved in using a user interface. Although usability can only be quantified through indirect measures and is therefore a nonfunctional requirement, it is closely related to a product's functionality.

Usability involves effectiveness, efficiency, and satisfaction where users can complete certain tasks as easy as possible. On the other hand, user experience covers a wider aspect of the user’s interaction with the website. Hope you can get the clear understanding of the difference between user experience and usability from this post.