If you've been asked to integrate the WhatsApp Business Platform (Cloud API) into a client project, you've probably discovered that the hardest part isn't the API calls — it's everything Meta requires around business verification, number quality, and message templates. A lot of integrations get stuck or blocked after launch because of a handful of avoidable mistakes. Here's what tends to trip people up. 1. Business verification gets rejected due to mismatched details Meta cross-c...