The definition of heuristics
According to the Oxford Dictionary, it is a method of solving problems by finding practical ways of dealing with them, learning from past experience.
Heuristic Evaluation is a usability inspection method: UX experts check out a website or an application using a set of predefined factors (these are the usability heuristics). It can be a good starting point for a redesign project (however, it can’t be as valuable as a Usability Test: a UX expert is able to point out some areas where improvement would be needed, but if it is possible, you should ask and observe the users as well.)
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