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Usability & User Experience
Web usability ,[object Object]
Web usability is about making your website in such a way that your site users can find what they're looking for quickly and efficiently.
The broad goal of usability can be: ,[object Object]
To give the correct choices to the users, in a very obvious way.
To remove any ambiguity regarding the consequences of an action e.g. clicking on delete/remove/purchase.
Put the most important thing in the right place on a web page or a web application. ,[object Object]
Usability Basics ,[object Object],[object Object]
Efficiency of use  : Once an experienced user has learned to use the system, how fast can he or she accomplish tasks?
Error frequency and severity  : How often do users make errors while using the system, how serious are these errors, and how do users recover from these errors?
Subjective satisfaction  : How much does the user like using the system?
Memorability  : If a user has used the system before, can he or she remember enough to use it effectively the next time or does the user have to start over again learning everything?
Facts ,[object Object]
A web usability redesign can increase the sales/conversion rate by 100% (source:  Jakob Nielson )
User Experience ,[object Object]
The level of satisfaction an average user gets form a product.
Satisfaction is related to how user:
1- like the product
2- understand the product
3- use the product
 
Difference Between Usability and UX ,[object Object]
Usability answers the question, “Can the user accomplish their goal?” with effectiveness, efficiency, and satisfaction about the results.

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Usability and UX