Google has introduced a new extension format to AdWords ads called Image Extensions, which allow advertisers the ability to add visual elements to paid search ads. These images enhance the search engine results page (SERP) with rich content to make text ads stand out on the page.
Image Extensions are likely to increase the click-through rate (CTR) of ads as they will have more of an impact to the searcher than a standard text ad format.
Advertisers are able to select the images that are displayed with their Pay-Per-Click (PPC) ads and each image will be reviewed by Google. The search engine says that the advertiser must have the necessary rights to the images they wish to display.
Image Extensions are currently in Beta and can only run in English, but are available globally.
Below is an example Google shared of a PPC ad with Image Extensions.
For a full list of Google AdWords ad extensions, see here.