What does Genesis 26:1 mean?

A severe famine hit the land, just like the one in Abraham's time. Isaac went to Gerar, where Abimelech was king of the Philistines. Genesis 26:1 - Modern Text Bible

(Another famine forces Isaac to move, echoing what happened to his father Abraham. He heads to Gerar, a Philistine city ruled by Abimelech.)