Google today announced the expansion of the "Go Google" advertising campaign worldwide in an effort to further promote the Google Apps, underscoring increasing competition to provide businesses with email and other office software.

The campaign, which already rolled out in the United States in August, will feature ads in publications such as The New York Times, Forbes and The Economist, as well as on billboards at airports and train stations in various cities. It will also start today in countries including the U.K., France, Canada, Japan, Australia and Singapore.

Google's campaign is trying to convince businesses to switch to its cloud-based services, in which software is accessed over the Internet and maintained at Google's data centers instead of on a company's computers. Cloud-based services can provide cost and maintenance savings over traditional software.

IBM and Microsoft have also recently introduced cloud products, while Cisco Systems is also reportedly ready to offer a cloud-based software.

According to Google, over two million business and 20 million users in over 100 countries and more than 40 languages have adopted Apps for their workplace.