Ever wonder when roaming around the Google Display Network as to why some text ads fill the entire ad unit on its own rather than being grouped with other text ads?  Are advertisers building banners mimicking a Google text ad? The answer is no.  These ads are known as expanded text ads in Google.  You do not need to setup anything specific in Google; it is expanded automatically and follows the same character limits as a typical text ad, but displayed solo with enlarged text.  Depending on price, relevance and competitive conditions the AdWords system will determine if your regular text ad is a good candidate to take the entire space itself.