This document provides tips for marketing an app or business without a budget, including leveraging advertising platforms, search engine optimization, social media marketing, cross-promotion, developing an online community, working with influencers, using analytics to understand the audience, and helping customers grow their business. The main sources of income for companies like Google come from advertising. Marketing through influencers with over 35,000 subscribers can provide thousands of impressions for less than $0.04 per click. Outsourcing is evolving from a cost-saving approach to a partnership model.