A deep link describes a hyperlink pointing to any section of a web page that is not the homepage. For example, if someone linked to this definition instead of the Computer Hope main page, that would be considered a deep link.
Companies or individuals may prohibit others from deep linking to their web pages because they believe a user may be confused by who is providing the information. They may also be concerned that it would reduce the amount of advertising displayed to site visitors.
Computer Hope welcomes any links to its website, even deep links, see: How to link to Computer Hope.