The document discusses Canada's Anti-Spam Legislation (CASL) and provides guidance on how to grow email lists and send marketing communications in compliance with CASL. It covers key aspects of CASL including the requirements for express versus implied consent, what needs to be included in commercial emails, and how CASL applies to non-profits. The document also provides tips on collecting email addresses from customers, examples of opt-in forms that comply with CASL, and recommends reviewing existing email lists and communications to ensure consent and language used is compliant. Common CASL questions are addressed such as whether consent needs to be reconfirmed and how CASL applies to social media.