Understanding the file path between the document you’re linking from and the document you’re linking to is essential to creating links.
Each web page has a unique address, called a Uniform Resource Locator (URL). However, when you create a local link (a link from one document to another on the same site), you generally don’t specify the entire URL of the document you’re linking to; instead, you specify a relative path from the current document or from the site’s root folder.
There are three types of link paths:
Absolute paths (such as http://www.adobe.com/support/dreamweaver/contents.html).
Document-relative paths (such as dreamweaver/contents.html).
Site root–relative paths (such as /support/dreamweaver/contents.html).
Using Dreamweaver, you can easily select the type of document path to create for your links.