How to divide a long WordPress post into multiple pages
using pagination you can divide long post and pages into multiple pages for pages navigation.Although there are a lot of free plugins are available but wordpress also have its built in pagination system for quick use.
A very long post can take too much time to load,slow down your site or maybe effect your users as well
How to use
if you want to split your post then simply switch to editors Text mode and paste below tag
you need to place this tag where you decide to split the post.
switch to editors Visual mode and press Alt+Shift+P where you want to spilit your post
Publish it and its done !
If for some reason, pagination is not showing up after you have pasted the next page tags, then you would need to add the following code in your single.php loop.
<!--?php wp_link_pages(); ?-->
hope this will help you.if you have any questions then let me know in comment section please.