Hyperlinks allow you to jump to specific pages, files or web addresses (URLs) with a single click.
Hyperlinks make it easy to navigate between areas in your publication or to access external resources—web pages, or files stored on the reader's local storage. Email addresses can be also linked to, which will launch the reader's email app and set up a message to a specified email address.
Hyperlinks created in Publisher are included when your document is exported as a PDF. Additionally, if you create a TOC or index and request hyperlinks on export, the TOC or index will be furnished with hyperlinks as appropriate.