Email and WhatsApp marketing let you reach customers who've already shown interest, at a much lower cost than paid ads. For email: build a list through website sign-ups, send regular value (not just promotions) — tips, updates, offers — and always include an unsubscribe option (required by law). For WhatsApp marketing: use it for order updates, appointment reminders, and offers, but always get explicit opt-in consent first — unsolicited WhatsApp marketing violates WhatsApp's policies and can get your number banned. We can set up compliant WhatsApp Business API integration for your business.