The jump name is used to create a Hypertext Anchor so that visitors may link directly to a particular section on a page.

What this means is that if a web site (www.somesite.com) has a page (page.php) with a section that has a jumpname of myname you may link to that section of the page using the HTTP standard "#" notation:

http://www.somesite.com/page.php#myname

and visitors would link directly to the myname section on that page.

Note: Jumpnames should NOT contain any spaces and are case sensitive, as such they are usually lowercase only.