Don’t forget that all Google AdWords advertisers must upgrade all existing campaigns to Enhanced Campaigns by July 22, 2013 or Google will automatically migrate your current campaigns for you, which may impact your advertising targeting settings.
Google is updating its device targeting by combining desktop and tablet devices under one setting where advertisers will not be able to eliminate one device over another, thus automatically showing ads on both desktop and tablet devices. Advertisers will still be able to “opt-out” of delivering ads on mobile devices by bidding -100% for mobile devices. If Google automatically upgrades your existing AdWords campaigns for you, it may select to opt-into mobile devices without your consent. This will affect advertisers that do not currently have mobile-friendly versions of their site and may spend un-wanted ad dollars.
The search engine has made it simple for advertisers to upgrade existing campaigns by introducing its Upgrade Center, which should be available for all users. Below is a screen shot of the new Upgrade Center available in Google AdWords.