For websites that are interested in improving their SEO or advertising on paid search, there is one absolutely crucial thing that they're going to need to make their efforts a success.
If you haven't guessed what that one thing is, yet (or read the title of this post), I'll go ahead and tell you. It's a keyword list, of course!
Since there are thousands of ways that people can begin searching for content or a type of product or service online, creating your own extensive and useful list can be quite the chore. No worries, though, because there are plenty of great keyword research tools on the Web that you can use RIGHT NOW that won't cost a cent.
That's right - all of the online keyword research tools in the big list that follows are totally free. So what are you waiting for?