Scaling a messaging strategy on the WhatsApp Business Platform is crucial for businesses looking to grow their trust and engagement with customers. To send messages at scale, businesses need to create a sender pool that has shared settings and features, including local phone numbers, which build trust with recipients. WhatsApp assigns a quality rating to each sender based on consumer reactions, and maintaining high quality is essential to increasing messaging capacity limits. Businesses can avoid consumers hitting "Block" or "Report" by sending relevant messages to opted-in users and providing easy ways for them to reply. To increase messaging limits, businesses must ensure their number quality is not low and meet specific criteria, such as starting conversations with half the number of customers as their current limit over a 7-day period. By following best practices, including understanding current tier and number quality, distributing messages consistently, and sending relevant personalized messages, businesses can successfully scale their WhatsApp messaging strategy.