Online surveys are a testing approach that allows a UX Designer to remotely collect feedback from hundreds of users on tasks or activities that do not require much imagination or emotion. Online surveys are useful for gathering quantitative data, such as ratings, rankings, preferences, and satisfaction levels. Online surveys are also relatively easy and inexpensive to administer and analyze. Usability studies and A/B testing are testing approaches that require more interaction and observation from the UX Designer and the users, and are more suitable for tasks or activities that involve more complexity, creativity, or emotion. References: [Online Surveys], [Usability Studies], [A/B Testing]