An internal link allows you to link to another page within your website. In addition internal links can also be used to jump to a section on the same web page. Using 'anchor' points clicking on an Internal link can allow a person browsing to scrolls the page up or down to the desired location. This is helpful to the user to quickly jump to the information he/she is looking for especially if the page in question if the page in question is quite long with regards to content.
This example is an internal link back to the main glossary.