The 3GP (3rd Generation Partnership Project) video format is a multimedia container format designed for mobile devices, primarily for 3G-enabled mobile phones. It uses codecs like H.263 for video compression and AMR-NB or AAC for audio compression. 3GP files are known for their small file sizes, making them suitable for efficient streaming and storage on mobile devices with limited bandwidth and storage capacity. While the popularity of 3GP has diminished with the advent of more advanced mobile technologies, it remains compatible with legacy devices and certain applications.