The list-posts.html-include is a loop to list posts. It’s a helper to add some additional content fast and easy. You can use it in individual posts for example. Which parameters you use, depends on you.
Possible parameter for the loop:
entries › define the number of entries to show
offset › define the offset (number of entries to skip before displaying the first one)
category › define only one category to display according entries
The loop looks when you use all parameters. Single parameters are possible of course.