Hermes was the herald god for the Olympians. He was the son of Zeus and Maia. He was the safeguard of trade roads as a god of traders, merchants. He was well-known for his cunning and shrewdness. He stole the cattle of Apollo and offered his invention lyre in exchange for them. So Hermes used a heralds staff from Apollo as the god of shepherds.
One of his duty was to guide the souls of the dead down to the underworld. He was also closely connected with bringing dreams to mortals. Hermes was usually depicted with a broad-brimmed hat or a winged cap, winged sandals and the heralds staff (kerykeion in Greek, or Caduceus in Latin). The clothes he wore, were usually that of a traveler, or that of a workman or shepherd. Other symbols of Hermes are the cock, tortoise and purse or pouch.Hermes was also the patron of roads and boundaries.
In Ephesus it stood on the corner at Domitian Square and was depicted with his heralds staff and winged sandals.