This document provides an overview of an introductory course on Web Science. It discusses key topics including: 1. What is Web Science and why it matters as an area of scientific study. 2. Key aspects of web architecture like URIs, URLs, HTTP, and file formats. 3. Methods of measuring the web through network analysis and studying structures like the blogosphere and social networks. 4. The Web Science Method which takes an iterative, mixed methods approach of engineering, measuring, and analyzing the web. 5. The social aspects of the web and challenges of incorporating human behavior. 6. Issues of web governance, security, and standards setting.