A deep link is a URL that links to a page within a website. That is, a page that isn’t the site’s homepage. For example…
Abicord wants to improve the rank of the smoking cessation page on its website. This page isn’t on the homepage, though it is linked from it. The smoking cessation page is specifically focussed on a stop smoking product.
Abicord wasn’t interested in keyword research and is happy with the keyword density of the current content. All it wanted was additional backlinks to help boost its deep linking.
In particular, it’s interested in having this page show up in sub-listings when people search for Abicord in Google. And deep linking is the key to encouraging Google to incorporate extra pages in its sub-listing.

