La Catedral Del Mar 1080p Cat-esp [tacones] Site

This is likely the "tag" of the release group or individual who encoded or uploaded the file. About the Series: La Catedral del Mar

The string you provided looks like a specific metadata tag for a high-definition video file—likely a release of the popular Spanish TV series (Cathedral of the Sea). What the Title Means La catedral del mar 1080p cat-esp [Tacones]

Refers to the inclusion of both Catalan and Spanish audio tracks or subtitles. This is likely the "tag" of the release