Device Adjustments are a way to set a broad percent modification to your bids in Shopping campaigns on both Google and Bing.
With them, you can set all bids within a campaign or ad group higher or lower per specific device. Devices include:
Desktop (Includes Laptops)
Ad Group Level Bid Adjustments
Navigate to Campaign Manager > Ad Groups for either channel you wish to operate on:
Toggle your Segment to Device:
Next, click on the blue % value for any particular device to open the editing menu. Apply your desired settings and click Set: