What does Isaiah 39:1 mean?

Around that time, Merodach-baladan, son of Baladan, king of Babylon, sent letters and a gift to Hezekiah, because he heard Hezekiah had been sick and recovered. Isaiah 39:1 - Modern Text Bible

(The Babylonian king reaches out to Hezekiah, likely with political motives, after hearing about his illness and recovery.)