The specific string you provided appears to be a release tag for a high-definition (1080p) digital copy.
: The video compression standard (H.264) used to encode the file. Dnevnik.Masinovodje.WEBRip.1080p.x264.AAC.S01.C...
: The audio format (Advanced Audio Coding), known for high quality at low bitrates. S01 : Season 1. The specific string you provided appears to be