: Indicates the source was a Blu-ray Disc . It is generally high quality, though usually compressed to a smaller file size than the original disc.

: The codec (video format) used to encode the video, typically resulting in an .avi file.

: Available for purchase by episode or season on Apple TV and Amazon Prime Video.

The tags in the title BDRip XviD-REWARD describe the technical specifications of that specific file:

While the file name suggests a pirated source, you can stream Shameless (US) through official platforms: : The original network for the series. Netflix : Often hosts all 11 seasons of the show.