Short Definition
Software with source code that is freely available for anyone to view, modify, and distribute. Open source projects promote collaboration, transparency, and innovation by allowing a community of developers to contribute to the software’s improvement.
Relevance
Open-source software allows users to freely use and modify the code. While it promotes collaboration and accessibility, support may be limited, and users may need technical skills to fully take advantage of it. Explaining open source can help others, but you should clarify that these tools may not always have the same level of reliability or support as commercial software.