Most blogging advice tells you to “write what you’re passionate about.” That’s how you end up with forty beautifully written posts and no readers.
Keyword research is the unglamorous bit that fixes it. It’s just finding out what your audience actually types into Google, so you write things people are looking for instead of publishing into the void. You don’t need an expensive tool to do it, and you don’t need to become an SEO. You need a simple workflow you’ll actually follow. Here’s mine, and it’s free.
Step 1: Get the ideas (free)
Start with Google itself. Type your topic into the search bar and read the autocomplete suggestions — those are real searches. Add letters and question words (“how”, “best”, “why”, “for beginners”) to pull more. Then look at the “People Also Ask” box and the related searches at the bottom of the results page. Between them, you’ll have a page of real topics in ten minutes.
For a blogger, long-tail keywords are the whole game — specific, lower-competition phrases like “how to prune tomatoes in pots” rather than “gardening”. You won’t outrank the big sites for the broad terms. You genuinely can win the specific ones.
Step 2: Check what you already rank for (free)
If your blog has been going for a while, set up Google Search Console — it’s free — and look at the Performance report. It shows every search you’re already appearing for, including terms where you’re sitting on page two getting no clicks.
Those “almost there” keywords are the easiest wins you’ll ever find. You already rank for them; you just need a better post, or a nudge up the page. Most bloggers never look. It’s the single most useful free thing you’re not doing.
Step 3: Skip the ones you can’t win
Here’s where most free workflows fall apart, so I’ll be straight about it.
The free methods above are brilliant at giving you ideas. Not one of them tells you which ideas you can actually rank for. And for a blogger, that’s the difference between keyword research working and wasting your weekend.
You can find a perfect-looking topic and pour a day into a post, only to discover page one is stitched up by sites with ten years and ten thousand backlinks on you. No amount of good writing beats that. Knowing to skip it before you write is the skill.
Step 4: When a paid tool is finally worth it
You can run a blog for a long time on free tools alone, and plenty of people do. But the moment you’re publishing seriously — a post a week, trying to actually grow — the guessing starts to cost you real time.
The thing worth paying for is a difficulty score: a number that tells you, at a glance, whether a keyword is in reach for a site your size. That one piece of information stops you writing posts that were never going to rank.
I use Mangools’ KWFinder. It’s built for exactly this reader — bloggers and small sites, not enterprise SEO teams. Type in a keyword, get long-tail variations with a difficulty score from 0 to 100: green means beatable, red means leave it. It’s a fraction of the cost of Ahrefs or Semrush, which are superb and priced for people doing this full-time. There’s a 10-day free trial with no card required, so run your real blog topics through it and see whether the difficulty scores change what you’d write.
The workflow, start to finish
Ideas from Google for free. Easy wins from Search Console for free. Then, before you commit a day to a post, a quick difficulty check so you’re writing things you can actually rank for. That’s the whole job — and for most of it, you never open your wallet.
Because for a blogger, the most expensive post isn’t the one that took longest to write. It’s the one that was never going to rank in the first place.
If you want the full list of free tools to start with, here’s my free keyword research tools roundup.
Frequently asked questions
Do bloggers really need keyword research?
If you want readers from Google, yes. Keyword research is just making sure the things you write are things people search for. Skip it and even great posts can go unread.
Can I do keyword research for my blog completely free?
Largely, yes — Google autocomplete, People Also Ask, related searches and Google Search Console will take you a long way for nothing. The one thing free tools don’t give you reliably is a difficulty score to tell you which topics you can actually rank for.
When should a blogger pay for a keyword tool?
Once you’re publishing regularly and trying to grow, when guessing at what you can rank for starts wasting real time. A cheap tool with a difficulty score usually pays for itself in the posts it stops you writing.
Affiliate disclosure: some links in this post are affiliate links. If you sign up through them it costs you nothing extra and helps keep this site running. I only recommend tools I actually use.