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PPC Hero covers all topics related to pay per click advertising - from Google AdWords to Yahoo! Search Marketing to landing pages to writing headlines.

WordStream provides Internet marketing software and tools which are designed to make your search marketing campaigns more organized and more profitable.

Standing Dog is an Internet marketing agency offering search engine optimization, social media marketing, and pay per click management.

Maximize Google AdWords, Yahoo Search Marketing & MSN results with professional account setup & management. Enjoy exceptional value, service & results.

Search Engine Land is a must read hub for news and information about search engine marketing, optimization and how search engines such as Google, Yahoo, Microsoft Live.com and Ask.com work for searchers.

PPC tools, trainings, and forums that give you access to sophisticated tools at an affordable price.

Search Marketing Sage is the official blog of Search Mojo, a search engine marketing company specializing in search engine optimization (SEO) and pay per click (PPC) advertising management.

Search Engine Optimization and Marketing forum.

White Shark Media offers search engine marketing to small and mid-sized businesses. Our focus is AdWords, Mobile Ads, adCenter & Local Business Websites

The best dictionary on internet marketing terms with the most comprehensive and understandable definitions anywhere. Written by internet marketers for internet marketers. Also provides the opportunity to contribute definitions to the content and prof...

AdWords Help, Advice and Tools from the author of Google AdWords For Dummies