This stands for Dolby Digital 5.1 surround sound. It provides six channels of audio (front left, center, front right, rear left, rear right, and a subwoofer), perfect for a home theater setup.
This file name refers to the 2016 romantic comedy starring Dakota Johnson, Rebel Wilson, and Alison Brie. Based on the technical specs provided, Movie Overview subtitle How to Be Single 2016 1080p WEB DL DD5...
This file likely includes "hardcoded" or "muxed" subtitles, or it is a standalone subtitle file (.srt) specifically synced to this high-definition release. Why use this version? This stands for Dolby Digital 5
The version is often considered the "gold standard" for digital collectors before a Blu-ray rip is available, as it lacks the onscreen logos or watermarks found in TV rips and maintains the original digital broadcast quality. and a subwoofer)