Demeter was worshiped under this name at Anthela, because it was a meeting place for the amphictyons of Thermopylae, who offered sacrifices to her at the start of every meeting.
At Anthela, Demeter was venerated by this name because it functioned as an assembly point for the Amphictyons of Thermopylae. At the onset of every gathering, they would perform sacrifices in her honor.