This document provides instructions for upgrading Google AdWords accounts to enhanced campaigns. Enhanced campaigns allow advertisers to reach users across devices from a single campaign, with features like customized bidding and optimized ads. The document outlines the benefits of enhanced campaigns and details three upgrade flows: simple upgrade for single campaigns, bulk upgrade using AdWords Editor for multiple campaigns, and merge flow for combining similar campaigns. Advertisers are advised to review their accounts, identify matching campaigns, select the appropriate upgrade flow, and adjust bids and ads as part of the upgrade process.