What does Jeremiah 3:1 mean?

If a man divorces his wife and she marries someone else, can he take her back? Wouldn’t that land be completely defiled? But you’ve acted like a prostitute with many lovers—yet you want to come back to me now? Jeremiah 3:1 - Modern Text Bible

(God uses the law about divorce to show how shocking it is for Israel to expect to return after so much unfaithfulness.)