Usability testing is a technique used to evaluate a product or service by testing it with representative users. The goal is to identify any usability issues and gather feedback to improve the user experience. Usability testing can be conducted in person or remotely, typically involves observing users as they complete tasks on the product or service. The advantages of usability testing include identifying usability issues early on, improving user satisfaction and engagement, and ultimately increasing the success of the product or service.

Unmoderated usability testing is a technique where users are given tasks to complete on a website or application without the presence of a moderator. The users' interactions are recorded and analyzed to identify any usability issues. The advantages of unmoderated usability testing include cost-effectiveness, flexibility, and the ability to reach a larger sample size. It also allows users to complete tasks in their own environment, providing more realistic feedback.

Heuristic evaluation is a method of assessing the usability of a website or digital application. It involves a group of evaluators who use a set of predefined heuristics or guidelines to identify usability issues. The evaluators then provide recommendations for improving the user experience. This technique is useful for identifying usability issues early in the design process and can save time and in the long run.

To create data-based personas, you need to start by collecting data on your target audience. This can include demographic information, behavior patterns, and preferences. Once you have this data, you can use it to create detailed profiles of your ideal customers, including their goals, pain points, and motivations. These personas can then be used to guide your marketing and product development efforts, helping you to better understand and connect with your audience.