Not much info on this location, however it was once a slaughter house. It doesn’t appear very large, so it might have been used for chickens possibly or smaller animals. It was the location used in Bereavement.
Slaanesh is the Chaos God of lust, excess, pleasure, perfection and hedonism
The name Slaanesh derives from Slaaneth - the god's name in the language of Chaos, (Slaa meaning "ecstasy", "pleasure", etc, Neth meaning "lord of", "master of", or "prince of"; hence, the Prince of Pleasure).