What does Isaiah 20:2 mean?

At that time, the Lord spoke to Isaiah, son of Amoz, saying, 'Take off the sackcloth from your body and the sandals from your feet.' So Isaiah did, walking around naked and barefoot. Isaiah 20:2 - Modern Text Bible

(God tells Isaiah to act out a sign: he’s to go around stripped and barefoot, symbolizing humiliation and captivity.)