What is interactivity? Interactivity is a key factor for the engagement and effectiveness of e-learning platforms. It describes the two-way communication between the learner and the digital content, such as through quizzes, simulations, discussions, or interactive videos. High interactivity promotes active learning and increases the retention rate of information. E-learning platforms use a variety of interactive methods to ensure that learners do not just passively absorb information, but are actively involved in the learning process.