What are these combined stories (ex: map with all the places I’ve been)? How do I edit these stories?

These boxes show you a summary of your activity during a specific month. These summaries can include the friends you connected with, events you attended, pages that you liked, and places you visited during that month.

Hover over each box and click on the to view the individual stories highlighted in that box or hide the entire box from your timeline. Note that hiding a box from your timeline doesn’t hide the individual stories featured in that box. To hide an individual story, choose the View Individual Stories option and follow these directions. You can also remove stories from your timeline from your activity log.