Google Adwords Editor is a powerful way to manage your campaigns and make bulk changes. You can upload new campaigns, ad groups, keyword destination urls and make changes to your existing campaigns.
You can even import CSV files with Google Adwords Editor and this video will show you how easy it is!
One thing to always keep in mind is to make sure you are working on the most current version of what exists in your Google Adwords Account. Whenever you start working in Google Adwords Editor make sure you download the most recent changes by clicking on “Get Recent Changes”
Wish you the best,