Google Keyword Planner is one of the most widely used keyword research tools. However, it’s not free and it doesn’t always provide keyword suggestions that will help you to get the traffic you’re after. There are plenty of free tools out there that can help you figure out which keywords you should be targeting. A tool called Word Stream, for example, offers an integrated keyword suggestion feature. You’ll enter a keyword into Workstreams, and it’ll generate a list of related keywords, along with the search volume for each of them. It’s a good way to get an idea of what keywords are worth your time and which ones aren’t.