Google Keyword Planner is the tool that started it all. Built into Google Ads, it was designed for advertisers planning paid campaigns, but it has been a foundational resource for organic keyword research ever since it launched. You enter a seed keyword or URL and Google returns a list of related terms with search volume ranges, competition levels for paid search, and average CPC bids. The data comes straight from Google, which means you’re working with the most authoritative source of search volume information available.
The key word in the previous sentence is “ranges.” Unless you have an active Google Ads campaign spending real money, Keyword Planner shows you broad volume brackets like “1K to 10K” rather than precise monthly figures. This is a meaningful limitation for organic SEO research, where the difference between 1,500 and 9,000 monthly searches matters a great deal for how you prioritise your keyword list. With an active campaign you get exact figures, but that requires actually spending on ads, which isn’t practical just for research purposes.
Despite this limitation, Keyword Planner remains essential, and I’d argue you should never do a keyword research project without at least consulting it. The suggested bid data is useful for understanding commercial intent, and the “Refine keywords” filters let you drill down by brand, non-brand, and keyword type in ways other tools don’t replicate exactly. It’s also completely free, which makes it the natural starting point for anyone beginning their keyword research journey. Pair it with Google Search Console for a powerful free research stack that will serve most small businesses well.