Hermes was instructed by Zeus to carry messages for him and for other Olympians. He served them in this and other ways. You can find out all about this in my book "Hermes the Olympian" available on Amazon.
Mars, Roman god of war, was had his counterpart in Greek Ares. Mercury, messenger of the gods, corresponds to Greek Hermes.
In Roman mythology, the god "Mercury" is equivalent to Hermes in Greek mythology. He is the god of messengers and travelers. So he is the messenger of the gods.
Mercurius (Mercury) was the Roman messenger of the gods.
Mercury was the Roman god of Messengers and Travelers. so he probably was the gods messenger.
The planets are named after ancient Roman ad Greek Gods - Mercury was the messenger of the Gods.
Saturn and mercury
Mercury
Mercury was the real name of the god Mercury and it was never changed. He was a Roman god. At one point of their history the Romans associated their gods to the Greek gods. The Greek equivalent of Mercury was Hermes.
I assume that the question is: Who is the messenger of the Gods? Hermes in Greek and Mercury in Roman.
The origin of Mercury comes from the Greek gods named Apollo & Hermes.
Hermes was the Greek messenger god. His Roman name was Mercury.
Hermes the messenger of the gods