Mercury controls communication.
Years ago messages from one ruler to another or between armies were carried by “heralds” who demanded great respect and weren’t to be harmed. The Roman god, Hermes was the fastest of these messengers. Because the planet, Mercury is the swiftest moving across the skies, Hermes is otherwise known as Mercury. He wears wings on his cap and sandals.
Now, the gods like to mess with humans just for the fun of it and to have something to do. So every once in awhile Mercury shows off and runs backwards. In the astrology world this is called moving, retro. When this happens, things connected with communications can get hinky. It’s advised not to sign contracts or to buy anything having to do with communications such as computers, TV’s, phones, etc. etc. until Mercury decides to behave himself and runs forward or direct.
Often when Mercury is retro, he likes to throw-up things from the past in our faces to take a second look at. And to make things even more interesting, Mercury likes to run backwards a lot.