In this video Jim Banks - http://www.spadesmedia.com walks you through the process of setting up a business on Google Adwords Express, using your own web site.
If you want to set up and use a Google My Business profile then you should watch https://www.youtube.com/watch?v=gipgDezz2Cg on how to set up your Google+ Page for your business.
You can find out more about Google My Business at http://www.google.com/business/
