Usability

What is usability?

Usability refers to the ease of access and use of a product or website. 

The usability of a product can be defined by the following components:

• Learnability: How easy is it for users to perform simple tasks the first time they use the product?
• Efficiency: How quickly can users accomplish tasks?
• Memorability: How easily can users go back to performing tasks efficiently after some period of time? 
• Errors: How many errors do users make, how easily can they fix them?
• Satisfaction: How pleasant is it to use the product?

A usable website has the following characteristics:

• Users become familiar with it easily. They are competent in using the website during the first contact with it. 
• Users achieve their goals through using the website. 
• It is easy to recall the interface of the website and how to use it on the next visit.