The term open sourCe refers to something people can modify and share because its designed is publicly accessible.
The term originated in the context of software development to designate a specific approach to creating computer programs. Today, however, "open source" designates a broader set of values—what we call "the open source way." Open source projects, products, or initiatives embrace and celebrate principles of open exchange, collaborative participation and rapid prototyping and transparency and meritocracy, and community-oriented development.
People prefer open source software to proprietary software for a number of reasons, including:
Control. Many people prefer open source software because they have more control over that kind of software. They can can examine the code to make sure it's not doing anything they don't want it to do, and they can change parts of it they don't like. Users who aren't programmers also benefit from open source software, because they can use this software for any purpose they wish—not merely the way someone else thinks they should.
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Community. Open source software often inspires a community of users and developers to form around it. That's not unique to open source; many popular applications are the subject of meetups and user groups. But in the case of open source, the community isn't just a fanbase THAT BUYS IN (emotionally or financially) to an elite user group; it's the people who produce and test and use and promote, and ultimately affect the software they love.