Did you know you could split a post/page up into different web pages so that it has pagination?

Please see this tutorial:
https://en.support.wordpress.com/nextpage/

You can use it throughout a long post to make two, three, four, or more pages out of the single post. When you view your post on your site, the multi-page links appear as links at the bottom. The links below are an example of the feature in action. (Note: The “View All” link will not show on your site, but is a feature specific to the support pages.)