Infinite scroll means that as a user scrolls down, new material in a list is automatically fetched from the server. The user doesn't need to click a "Next Page" link to keep scrolling. The advantages are three-fold:

1. The user experience is smoother.
2. The user gets drawn into more of your content.
3. Initial page load can be much faster. This is especially true for a post with a lot of comments. Responsive Tabs will load the page without the comments and then fetch comments as the user scrolls down. This saves as much as half a second in load time in our tests on a post with 150 comments.

Responsive Tabs allows you separately configure infinite scroll as on or off for post lists, post comments and the Front Page List widgets that come with the theme.