Opt-in and opt-out are the two extremes of consent in marketing. Opt-in occurs when a customer explicitly agrees to receive communications through a particular channel: they check a box, subscribe to a newsletter, or confirm that they want notifications via WhatsApp. Opt-out occurs when they decide to unsubscribe, and the company must stop contacting them through that channel.

Why does it matter?

Permission is the foundation of any direct channel. Sending messages to people who haven’t requested them leads to blocks, spam reports, and mistrust. Additionally, platforms like Meta and email providers require consent, and many countries have data protection laws that regulate this. The rules vary by country and channel, so it’s a good idea to review them with your legal team.

• Protect your reputation: fewer spam reports mean better deliverability.
• Improves results: A database that chose to listen to you responds better.
• Respect the unsubscribe request: A quick and easy opt-out is part of a good experience, not a loss.

It's also a good idea to ask for permission on a per-channel basis. A customer might prefer emails over WhatsApp messages—or vice versa.

Story mode

Lucia shops at an online sports store, and when she checks out, she checks the box to receive updates via WhatsApp. That’s her opt-in. Months later, she receives too many messages about topics that don’t interest her and replies “UNSUBSCRIBE.” The store records her opt-out and stops messaging her through that channel, although it continues to send her emails, which she never opted out of. Lucia doesn’t feel harassed and continues to shop there.

How to Use It with Data4Sales

Data4Sales doesn't replace your consent policy, but it helps ensure that every message is relevant to the recipient—which is the best way to prevent unsubscribes:

• You consolidate each customer into a 360° profile that includes their contact information, purchases, and conversations.
• You segment audiences by behavior so you don't send the same message to your entire customer base.
• Manage WhatsApp, email, and SMS communications from a single platform, choosing the right channel for each customer.

Related terms

• WhatsApp Marketing
• Email marketing
• First-party data
• Deliverability