To advertise with Google AdWords, you must have a web site that you want to promote.
If you do not have a web site, you can easily create one for free using Google Sites. Google Sites is a free application daring that makes creating a web site as easy as editing a document. You can mengubahsuaikan sites as you wish, and even mengunggah image associated with your business or service. Then, you can use the web site URL in the AdWords ads so that the user is directed to the site when you click on the ad.
For a brief tutorial on using Google Sites, visit http://www.google.com/sites, then click Pirsa Short Tutorial. You can also find answers to common questions in http://www.google.com/support/sites. (Note: This may only be available in certain languages.)