In Excel, simply click the link (in PowerPoint, you must be in Slide Show mode; in Word, you must hold down the Ctrl key while clicking the link).
Your default Web browser opens and displays the Web page.
Click the Close button on the document window to close the browser, or press Alt+Tab to toggle back to your original document.
INTRODUCTION
URL hyperlinks in your Office documents can be used by the people viewing those documents to immediately start their Web browsers and visit the Web page to which the URL link refers (assuming they are connected to the Internet already). The exact process by which this occurs, however, can vary slightly depending on which Office application you are using.
TIP
Using URL Links in PowerPoint
In PowerPoint, you need only click a hyperlink to view the link's associated Web page, but doing so works only when you are giving the presentation in Slide Show mode.