Express consent in cybersecurity refers to the explicit permission a user gives after being clearly informed about what they are agreeing to. This consent is typically obtained through clear, affirmative actions such as checking a box, clicking 'I agree,' or signing a document. Express consent is crucial for compliance with privacy regulations, as it demonstrates that the user was not misled or coerced and fully understood the implications of their agreement. Organizations must ensure that the information provided to users is transparent and easy to understand, enabling users to make informed decisions about their data and privacy.