Bet or Beit means house, so city was named "the home of She'an". The hill or "tel" in the background is the old city or fortress of Bet She'an. In the last chapter of 1 Samuel is a description of what happened here. King Saul and his three sons had a battle here and all four died in the battle. The next King of Israel, David, finds out about the deaths and laments their deaths in the first chapter of 2 Samuel.
About a 1000 years latter a Roman town was built here. It was fun to walk around and see the shops, baths and homes.