This is a "release group" or source tag from a specific file-sharing site. Where to Watch Officially

Set in the 1970s, the story follows Amandeep Singh (Sidharth Malhotra), an Indian undercover agent (RAW) tasked with a covert operation on Pakistani soil to expose a clandestine nuclear weapons program. Technical Breakdown of the File

The video compression standard (H.264). It is widely compatible with almost all modern TVs, computers, and mobile devices.

This stands for "Web Download." It indicates the file was losslessly ripped from a streaming service (in this case, Netflix). This is generally higher quality than a "WEBRip" because it is a direct capture of the original stream.