What does Genesis 37:23 mean?

After that, they sat down to eat. Looking up, they saw a caravan of Ishmaelites coming from Gilead, with their camels loaded with spices, balm, and myrrh, on their way to Egypt. Genesis 37:23 - Modern Text Bible

(While Joseph is in the pit, the brothers see traders passing by, which will lead to the next part of Joseph’s story.)