This document provides an overview of Web 2.0 tools and how libraries can use them for marketing purposes. It defines key Web 2.0 concepts like RSS feeds, tagging, social bookmarking, blogging, wikis, etc. It also discusses how libraries can create social media policies and guidelines for Web 2.0 tool use. Examples are given of libraries successfully using tools like Facebook, Flickr, YouTube, and blogs. Ideas are provided for how libraries can use specific Web 2.0 tools for marketing, like creating video tutorials or crowdsourcing new ideas. Best practices emphasized include frequent updates, engaging users, and facilitating user-generated content.