Tell about usability testing.

Usability Testing is a research method aimed at evaluating how easy it is to use a product (software, website, application). It identifies problems in navigation, interface understanding, and task completion by users.

Goals of usability testing:

Assess the ease of learning (learnability).
Determine the efficiency of task execution.
Measure user satisfaction.
Find errors and non-obvious elements in the interface.

Main methods:

Moderated testing: The tester observes and interacts with the user during task execution. Allows asking questions and receiving real-time feedback.
Unmoderated testing: Users perform tasks independently, their actions and thoughts are recorded (e.g., using special tools). Suitable for testing on a large user sample.
Think Aloud protocol: The user verbalizes their thoughts during interaction with the product. Helps understand user logic and expectations.
A/B testing: Comparing two interface versions to determine the most effective one.
Clickstream analysis: Analyzing the user's path through the product to identify "difficult" areas.

Stages of implementation:

Planning: Defining goals, objectives, target audience, selecting methods and scenarios.
Preparation: Creating task scenarios, selecting participants, setting up recording tools.
Execution: Observing users, recording their actions and comments.
Analysis: Summarizing results, identifying typical problems, prioritizing them.
Reporting: Preparing a report with problem descriptions and recommendations for their resolution.

Metrics:

Time to complete a task.
Number of errors.
Success rate of task completion.
Subjective satisfaction assessment (e.g., via questionnaires).

Tools:

Lookback, UserTesting.com (platforms for remote usability testing).
Hotjar, Crazy Egg (for click, scroll, and user behavior analysis).
Screen recording software.

Usability testing helps create a product that is intuitive and convenient for the target audience, which directly affects user satisfaction and product success.