The GNU General Public License (GPL) is a free (as in freedom) software license that is used by many open source projects, including WordPress. While many of us are probably familiar with the GPL, there are also a number of misconceptions. It’s important, as WordPress professionals, for us to be able to talk about the GPL with our clients and coworkers — both in terms of what the GPL says and also what it doesn’t say. The GPL is based on some extremely powerful ideas, and it’s a shame that they are sometimes misunderstood. If you feel like you could use a refresher, or ideas about how to explain the GPL to people you’re working with, this talk is for you. Target audience: Anyone interested in getting into GPL products or wanting to learn more about what they’re already doing. This can be building them, purchasing them, or modifying ones that already exist. Takeaways: 1. What does the GPL actually mean? We’ll cover several examples of what sort of circumstances are and are not permitted under the GPL (as well as the sort of obligations you have when working with GPL-licensed software like WordPress). 2. How do I make money from GPL products if people can just copy and distribute my work? 3. What are some common misconceptions people have when talking about the GPL and where can you get some clarification.