WhatsApp Marketing: bulk campaigns that convert

WhatsApp Marketing is using the API and templates to talk to many customers at once: promotions, intakes, carts, reminders. Open rates sit around 98%. That does not mean you should write to everyone who ever gave you a phone number.

This guide is the method for campaigns that convert and keep the number in high quality.

API or nothing

With the WhatsApp Business app you can run short broadcast lists. That is not a marketing channel. It cuts off, there is no real analytics, and you mix a sales rep's personal number with 800 broadcasts.

Real campaigns come from a WhatsApp CRM connected to the API. In ManyContacts: segment → template → send → replies land in the inbox.

Opt-in: the rule everyone fakes

Opt-in is not "it's in my spreadsheet". It is that the person accepted WhatsApp from your brand. Valid examples:

• Checkbox on the form ("I agree to updates on WhatsApp").
• The customer wrote first and you asked permission for alerts.
• In-store signup with a sign and a signature / QR.

Invalid examples:

• A 2019 event list.
• Numbers from an ad selling "qualified databases".
• Email customers you never mentioned WhatsApp to.

Without opt-in, the most creative campaign is suicide for the number. Meta measures blocks. The law (LSSI / GDPR) exists too.

Anatomy of a campaign that works

1. One goal. Appointments, not "engagement". Seats, not "branding".
2. A small, precise segment. 400 from one intake, not 12,000 from all of history.
3. A clear marketing template, one name variable, one CTA.
4. Team or AI ready for replies in the next 30 minutes.
5. Human hours. 10:00–13:00 or 17:00–19:00. Not Sunday at 23:40.

The classic mistake is firing 8,000 messages at 9:01 and three sales reps panic. Or nobody shows up and the AI is off.

Campaign ideas by industry (with permission)

• eCommerce: cart at 1 h / 24 h. Guide: recover abandoned carts.
• Academies: "8 seats left in the afternoon group." Landing: training.
• Dealerships: a unit back in stock, financing approved. WhatsApp for car dealerships.
• Clinics: check-up reminder (utility, not a promo in disguise).
• Real estate: "The Usera flat dropped €8,000" only to people who asked for that area.

If the message could be a generic newsletter email, it is not ready for WhatsApp.

Metrics: do not stop at 98% open rate

WhatsApp opens almost everything. Measure:

• Delivered / read (channel health).
• Replies.
• Clicks if there is a URL button.
• Appointments or orders attributed to that campaign.
• Opt-outs and blocks (if they rise, you stop).

A campaign with 40% reads and 0.3% blocks can be better than one with 90% reads and 4% blocks. The second one shuts the tap.

Number quality and limits

Meta assigns you a tier of unique recipients per day. You start low and climb if quality holds. Burning the tier in month one is textbook.

Scale gradually: 200, 500, 2,000. Do not ask for the jump to 50,000 on a lukewarm list.

If quality drops to medium or low:

1. Stop marketing campaigns.
2. Keep utility only (appointments, shipments).
3. Clean the list (inactives, complaints).
4. Review the copy.

Campaign + conversation (the real funnel)

The template does not close. It opens. The value is in the replies:

• AI filters "how much is it?" and "I'm no longer interested".
• The human steps in on "I want a seat / I want a viewing".
• The kanban moves. If the campaign creates no cards, you only made noise.

That is WhatsApp Marketing as product, not vanity.

Checklist before you hit send

• [ ] Documented opt-in.
• [ ] Template approved in the right category.
• [ ] Segment < 20% of the list, unless it is utility.
• [ ] Inbox covered (people or AI).
• [ ] UTM link if there is a URL.
• [ ] Opt-out wording.
• [ ] Number quality in green.

A realistic calendar for month one

• Week 1: clean opt-in. One template. A segment of 200. Measure blocks.
• Week 2: same template, 500. Adjust time and first line.
• Week 3: second campaign (utility: reminders), not another promo.
• Week 4: look at revenue or appointments, not vanity. Decide whether to scale or stop.

Whoever publishes "12 WhatsApp newsletters a month" on day 1 is usually off the number by day 20.

Team and shifts on send day

Assign a Slack/Teams channel: "campaign is live". A human watches the first 20 threads in case the copy was misread. AI covers the rest. If at 15 minutes there is a repeated complaint ("I never signed up"), you stop. Cheaper than arguing with Meta the week after.

Next step

Pick one useful campaign this week, not a calendar of 12 sends. Create the account or book a demo and we launch it on a clean list.