This document discusses marketing strategies for startups with limited budgets. It provides several case studies of marketing campaigns done with budgets between 15k-20k that went viral. It also proposes 5 ideas for low-budget marketing campaigns, such as growing plants in teams to share on social media, writing letters by hand to customers, creating a comic strip with company characters, personifying software components in fictional fights, and greeting customers at the airport with signs and smiles. The overall message is that marketing for startups should be idea-driven rather than budget-driven and can be very effective with limited funds through creativity, community involvement, and psychological tactics.