What does 1 Chronicles 20:5 mean?

Later, there was another fight with the Philistines, and Elhanan, son of Jair, killed Lahmi, Goliath's brother, whose spear was as thick as a weaver's beam. 1 Chronicles 20:5 - Modern Text Bible

(Another battle with the Philistines. Elhanan kills Lahmi, a giant like Goliath, showing Israel's continued strength.)