This document discusses the concept of human engine optimization (HEO), which aims to optimize websites for human users rather than search engines. HEO focuses on improving the user experience through techniques like clear structuring, relevant keywords and content, and naturally obtained backlinks from social sharing. The document compares HEO to traditional SEO and provides examples of how to test content and structure through tools like Google Website Optimizer. The overall message is that websites should prioritize usability and conversions over purely chasing traffic or rankings.