This stands for "Web Download," meaning the file was sourced directly from a streaming service or digital platform, ensuring better quality than a "Cam" or "TVRip."
The naming convention of the file provides specific technical details for the media: : The video resolution (Standard Definition).
One of the main reasons this film remains in the rotation for Bengali movie fans is its star-studded ensemble: Prosenjit Chatterjee
If you stumble upon the file — Sneher.Protidan.2003.480p.JC.WEB-DL.Bengali.AAC — do not delete it. Do not wait for a remaster. Watch it on a small laptop screen at midnight, with cheap earphones. Let the digital artifacts wash over you. Listen to the crackle of a world that has since been redeveloped into a mall.