Google is providing free tool to manage large and multiple campaign simultanously. That way we can manage campaigns in the comfort of our home without logging into online adwords control panel everytime.

This tool is simple to use yet pretty secure,

Following steps help to upload your changes,

You can post all changes in your account, or you can select specific campaigns to post. To post all changes in your account, follow these steps:
Click Post Changes in the tool bar.
You'll see a summary of the changes that will be posted to AdWords.
Click Post to upload your changes, or click Cancel to cancel the post.
If you click Post, you'll see a detailed summary, by campaign, of the progress of your post. (If desired, keep a record of your post by copying this report into a separate document.)
If you need to pause while your changes are posting, click Pause in the posting dialog. Then click Resume Post when you're ready to begin.
Click Close when the post is complete. To post changes in select campaigns, follow these steps:
In the tree view, select the account name. If you only want to post one campaign, you can select the campaign name.
On the Campaigns tab, select the campaigns you want to post.
Click Post Selected Campaigns in the tool bar.
Select the radio button indicating you only want to post changes in your selected campaign.
Click Post to upload your changes, or click Cancel to cancel the post.
If you click Post, you'll see a detailed summary, by campaign, of the progress of your post. (If desired, keep a record of your post by copying this report into a separate document.)
If you need to pause while your changes are posting, click Pause in the posting dialog. Then click Resume Post when you're ready to begin.
Click Close when the post is complete.

www.google.com/intl/en/adwordseditor/

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