These International agencies must take in consideration more factors that a national advertising company does. Two professors from NYU highlight the factors, issues, and solutions in their International Advertising article. When it comes to advertising one product or message around the world, your audience becomes much more broad. This in turn makes your advertisement campaigns much more challenging. But some products do not sick to one image or idea, but create ads that will appeal to each country.
Browsing through advertisements that have developed a specific image, I came across the Got Milk? campaign. This advertisement strategy of the milk mustache did not follow its brand around the world. Interestingly, the milk mustache was only used in one other county, which as Australia. Take a look at the different ads on the blog entitled: The "Got Milk?" Ad Campaign Around the World. Check out the companies strategies and how they differ from country to country.