
User Experience (UX) is how a person feels when interfacing with a system. 
 The system could be a website, a web application or desktop software 
 
The Definition :
User experience (abbreviated as UX) is how a person feels when interfacing with a system. The system could be a website, a web application or desktop software and, in modern contexts, is generally denoted by some form of human-computer interaction (HCI).
Below keywords highlights the main factors of a good UX design. 

Why User Experience is So Important ?
 User Experience is very important because it deals with our users’ needs — enough said,” 
and everyone would probably be satisfied with that.
 

Things To Know About UX :
- UX Design Is Not One Size Fits All
 - Not the Same Thing as Usability ( UX focuses on the feelings while the usability on the user friendliness )
 - Results Are Not Directly Measurable
 
Tasks And Techniques :

 
 
References :
Jacob Gube, Smashing Magazine