The way a user enters a relationship base is very important in defining its quality and life cycle. The relationship with the customer develops better when we take care of the way in which we constantly send our marketing communications to them. Opt in e opt out deal precisely with the input and output aspects of this client:
opt in
Through the action of Opt-In The user requests at some point a registration, either on the website or in the company, agreeing to receive communications by email, is the most correct way to start an email marketing relationship strategy, with the correct entry of this user into your relationship list.
O opt in It can also occur through other forms such as the entry of this user into other points of contact with the company such as through Social Media, Search Marketing or even participating in a cultural contest.
Opt-Out
It is the act of unsubscribing by the user through which he informs the issuer that he no longer wishes to receive that communication via email and that he wishes to be removed from his email list.