Ogg is a free and open multimedia container format developed by the Xiph Foundation. It is commonly used to store audio data compressed with codecs like Vorbis, offering high-quality sound and efficient compression. It is popular in open-source applications and streaming services.

The Ogg format, developed by the Xiph Foundation, was first released in 2000. It was created to provide a free and open container format for multimedia data, primarily audio. The most common codec used within the Ogg container is Vorbis, which was designed to compete with proprietary codecs like MP3 and AAC. The development of Ogg and Vorbis was driven by a desire to avoid the patent issues associated with other formats, making it an attractive option for open-source software and digital distribution. Over time, Ogg Vorbis gained popularity for its high-quality audio and efficient compression, becoming a preferred choice for many open-source applications and streaming services.