Google has launched Google For Advertisers. If you advertise on Google or plan to do so in the future, you should bookmark the URL and make periodic visits.
The Marketing Cycle features separate sections on
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Defining Strategy
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Creating Ads
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Planning and Buying Media
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Optimizing the Campaigns
Google Business Channel
Google also has a YouTube channel that covers Google Advertising and other business opportunities available through Google. You can watch various webinars and videos there.
Inside Adwords has a blog post about Google For Advertisers.

