In this example:
As you scroll and load additional posts your browsers address bar(URL) will update with the current page number.
Find out more about this Ajax Load More add-on and it’s functionality by visiting the Search Engine Optimization page.
The following shortcode was used to create the Paging URLs example.
[ajax_load_more seo="true" post_type="portfolio" posts_per_page="2" scroll="true" transition="fade" images_loaded="true" button_label="Next Page"]