This document provides tips on how to harness free data for content campaigns. It explains that data-driven content is important because data pitches win over journalists, add credibility, increase engagement, create thought leadership, and generate relevant coverage. It then lists many free sources for public data, such as the WHO, Google Trends, Instagram, and NASA. It also gives examples of using data from these sources to find the most popular food on Instagram, the city with the most culture based on attractions, and the top 30 celebrity female entrepreneurs. The document stresses making the most of free data and always pitching data to journalists.