Not all online platforms are open-source, but many of the most popular platforms are. In fact, most of the most important software on the Internet is open-source.
So it makes sense to know a bit about open-source, and how it can help you build your projects online.
Open-source software is software code with a license that allows free use.
Apache, the software that runs web servers, is open-source. WordPress, the software that powers most blogs and websites, is open-source. Linux, an entire operating system that you can install on your computer, is open-source.
Open-source code is governed by open-source licenses. There are many open-source licenses. One of the most commonly used open-source licenses is the GPL license.
GPL is the license for WordPress, and for every WordPress plugin and theme — they are all free, even the pro versions [from the WordPress collection – opens in a new tab].