Those who participate in our activities already know. It is the moment when we inform the participants about the activity, explaining what it consists of (a questionnaire, a usability test, an interview), what is the objective and purpose, and framing it in the project in which it is inserted. Thus, participants have information about the activity and can freely decide whether they want to participate. We explain and respond to doubts or questions and provide a paper document, which they sign, and the person responsible for the project also signs.