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The number of errors users make while performing a specific task. Can indicate issues with the interface or system. Lower rates are preferable.

A measure of how products and services meet or surpass customer expectation. Usually obtained by a survey with a scale, for example, 1 to 5, where higher scores indicate higher satisfaction.

Measures where a user makes their first click on an interface when trying to complete a task. Indicates initial user understanding and can predict task completion success.

A subjective workload assessment tool that rates perceived workloads to help users evaluate the task difficulty across six dimensions: mental demand, physical demand, temporal demand, performance, effort, and frustration.

A statistical method of comparing two versions of a webpage or app against each other to determine which one performs better in terms of user experience metrics.

The percentage of users who return to the app or website after their first visit. High retention rates suggest good user experience and long-term engagement.

The percentage of users who leave from a particular page after visiting any number of pages on the site, indicating potential issues with that page.

A qualitative metric involving recordings of user interactions that can be played back to observe how users navigate the system, which can reveal usability issues.

Measures customer loyalty and satisfaction by asking how likely users are to recommend the product/service to others on a scale from 0-10. Scores are grouped into Promoters, Passives, and Detractors.

The ratio of user clicks to the number of times a link, button, or advertisement is displayed. Higher CTR may inform more compelling content or effective calls-to-action.

A technology that measures where and for how long one's eyes focus on an interface. High fixation on certain areas can indicate interest, confusion, or a point of decision.

The rate at which users leave a task before completing it. A high abandonment rate might indicate usability issues or a mismatch between user expectations and the system.

Visual representations of data that show the most popular (hot) and unpopular (cold) elements of a web page interface with the use of color scales.

The percentage of correctly completed tasks by the users. It is an indicator of how easy it is for users to achieve their goals using the system.

The percentage of users who take a desired action, such as making a purchase or signing up for an account. Higher conversion rates imply a better user experience leading to successful completion of goals.

A quick and dirty questionnaire to evaluate a wide variety of products and services. Consists of 10 questions scored from Strongly Agree to Strongly Disagree. Results in a score between 0-100, reflecting usability.

The amount of time a user takes to complete a specific task. Measured during user testing. Shorter times generally indicate better usability assuming the task is successfully completed.

Analyzing how the cursor moves and where it clicks can give insights into user behavior and usability issues, closely simulating eye movement tracking for computer-based tasks.

A method for evaluating a product by testing it on users. Can involve multiple metrics such as task success rate, time on task, and error rate to gain insights into usability.