It's used to describe things that are sequenced according to when they happened, from earliest to latest.
For example:
* A chronological list of events would present the events in the order they occurred.
* A chronological history book would tell the story of a period in time in the order that events happened.
* A chronological resume would list your work experience starting with your earliest job and ending with your most recent one.
Let me know if you have any other questions!