What are the advantages of GPL v3?
GPL is the most widely used open source license in the world. Linux, MySQL, WordPress and other major open source projects are all licensed under the GPL. The GPL is designed to ensure that you have the freedom to modify the software you use as you see fit. In return, you are asked to ensure that any users of software that you have built using GPL software receive the same freedom to modify your software in turn. Licensing under GPLv3 ensures the highest amount of availability in the open source community.