Your text ads may appear on mobile browsers when users search Google from a mobile phone. When users see these ads, they can click the link to your website. Ad displays with more than 70 characters are adapted so that only the Headline and URL is displayed when the ad appears on a mobile browser. Your websites landing page may also be adapted so that its better displayed on mobile phones that do not have rich internet browsers, thereby enhancing the overall web experience for you and your potential customers.

You can opt out your eligible search ads from running on Google Mobile Search pages at any time. On the Campaign Summary page, select the link that says View performance data for these ads from within the alert message or below the table that contains your campaigns. On the bottom of the page that reads “Performance Data: Search Ads on Google Mobile Search, click on the link that says Yes, opt me out to stop running your search ads.

For more information, visit AdWords Help Center.