What does 2 Kings 18:29 mean?

Then Eliakim the son of Hilkiah, Shebnah, and Joah, said to Rabshakeh, “Please speak to your servants in the Syrian language, for we understand it. Don’t speak with us in the Jews’ language, in the hearing of the people who are on the wall.”

But Rabshakeh said to them, “Has my master sent me to your master and to you, to speak these words? Hasn’t he sent me to the men who sit on the wall, to eat their own dung, and to drink their own urine with you?”

Then Rabshakeh stood, and cried with a loud voice in the Jews’ language, and spoke, saying, “Hear the word of the great king, the king of Assyria.

Don’t let Hezekiah make you trust in Yahweh, saying, “Yahweh will surely deliver us, and this city shall not be given into the hand of the king of Assyria.”

Don’t listen to Hezekiah.’ For thus says the king of Assyria, ‘Make your peace with me, and come out to me; and everyone of you eat from his own vine, and everyone from his own fig tree, and everyone drink water from his own cistern;

until I come and take you away to a land like your own land, a land of grain and new wine, a land of bread and vineyards, a land of olive trees and of honey, that you may live, and not die. Don’t listen to Hezekiah, when he persuades you, saying, “Yahweh will deliver us.”