A complete guide to using Google's Keyword Planner for SEO keyword research, content optimization and topic ideas.

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Keyword research is quite possibly the most important part of SEO. You cannot begin to plan for a campaign unless you know which phrases you are targeting, and you cannot estimate costs and returns from SEO unless you first know who you’re competing against.

One of the hardest things to do in keyword research is to uncover related keywords. With that in mind, the tools I’m reviewing today all help identify rela

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