Say you want to pull content from one page to a template or another page. Well this function is for you! You can also change get_page_by_path to get_page_by_id and utilize an id instead.

Pull content from another page.php

// Pull content from another page
function show_post($path) {
  $post = get_page_by_path($path);
  $content = apply_filters('the_content', $post->post_content);
  echo $content;
}
 
// To use
<?php show_post('about'); ?>