This document discusses how participating in communities can help advance one's career in the IT industry. It notes that the IT industry is constantly changing, driven by business needs, and has adjusted to open source. Communities play a key role in innovation in open source. The author recommends getting involved in communities by attending meetups, fixing bugs, contributing documentation, sharing knowledge, blogging, and speaking. Participating satisfies personal interests and can provide visibility, career opportunities, and the ability to start one's own business. Overcoming fears and sticking one's neck out are important to get started. Commercial benefits come as byproducts, not the main goal, and there are many willing to help within communities.