Wikipedia is a free, collaboratively edited online encyclopedia that offers a vast collection of articles accumulated through the contributions of volunteers worldwide. Launched in January 2001, with the Indonesian version beginning in 2003, it has grown to feature millions of articles in over 285 languages, catering to a diverse global audience. The platform operates under the Wikimedia Foundation, a non-profit organization dedicated to providing freely accessible knowledge.

Users are encouraged to edit and enhance articles, adding value through their expertise and insights. This openness fosters a dynamic exchange of information on a wide array of topics, making learning interactive and inclusive. Wikipedia's content, along with images and other media, is protected under dual licenses, ensuring that it remains freely distributable and reproducible.

In addition to the main encyclopedia, Wikimedia Foundation also manages several related projects, including Wiktionary, Wikiquote, and Wikimedia Commons, enhancing the availability of information and resources across various formats and languages.