The document discusses various tactics for acquiring users with zero marketing budget, including becoming active on social media, optimizing website speed, blogging as a thought leader, using infographics, sharing on forums, A/B testing headlines and calls to action, building an engaged community, leveraging curiosity and contests, retargeting existing visitors, and using affiliates. It also outlines Neil Patel's three levels of the customer funnel - getting visitors, activating members, and retaining users - and provides examples of how to progress customers through each level.