Google AdWords scripts provide a way of controlling your AdWords account using JavaScript code. Scripts can be used to automate tasks or interact with external data. The most common subjects of AdWords Scripting i am used to work with are: Bid Modifiers, Pausing and Deletion, Third Party Data Processing, Bidding and Budgets, Tools, Alerts, Reporting, Seasonal, Automating Maintenance Tasks, Labels, Tracking, Ad Text, Keywords, Google Display Network and Shopping Campaigns, Other.