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eMarketer helps companies understand the internet by publishing internet market research, statistics and objective analysis on internet marketing, internet advertising, online trends and online demographics.

Ad Age is the leading global source of news, intelligence and conversation for marketing and media communities

Adweek is the destination for creative thought leaders and advertising industry influencers looking for the latest strategies, innovations and ideas. Coverage extends beyond traditional advertising to include social media, pop culture and design.

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.

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

We aren’t another me-too online marketing blog.

Learn how to create successful Internet marketing campaigns. ClickZ has expert advice about online marketing, email, brand and interactive marketing, and search engine marketing. Read the latest Internet advertising news, e-commerce market research, ...

Marketing data and charts for marketers and analysts. Useful spreadsheet downloads to prepare your presentations and budgets.

Insightful Analysis and Commentary for U.S. and Global Equity Investors

Quora is a continually improving collection of questions and answers created, edited, and organized by everyone who uses it.