A Step‑by‑Step Guide to Building High‑Intent Keyword Lists for E‑Commerce PPC Campaigns

If you’ve ever watched a PPC budget disappear faster than a coffee on a Monday morning, you know why the right keywords matter. In e‑commerce, a single mis‑matched term can drain cash while your competitors scoop up the clicks. That’s why a solid, high‑intent keyword list is the backbone of any profitable campaign. Let’s walk through how to build one that actually brings shoppers to checkout, not just browsers to your site.

Why “High‑Intent” Is the Sweet Spot

High‑intent keywords are the phrases shoppers use when they’re ready to buy. Think “buy leather boots size 9” instead of “cool boots.” The former signals a clear purchase decision, the latter is just curiosity. Targeting intent means you pay for clicks that are more likely to convert, which stretches every dollar in your ad spend.

Step 1: Start With Your Product Catalog

Your own data is the best place to begin. Pull a list of product titles, SKUs, and any attribute fields you have—color, size, brand, material. Even if your catalog is a spreadsheet, that raw list is gold.

Tip: Export the catalog as a CSV and open it in a simple text editor. You’ll see the exact words customers see on your site. Those are the words they’ll type into Google.

Step 2: Brainstorm Seed Keywords

Seed keywords are the short, core terms that describe each product. For a pair of running shoes, seeds might be “running shoes,” “men’s running shoes,” “Nike trail shoes.”

How to do it: Look at the product titles you just exported. Strip out the fluff—remove words like “new,” “sale,” “best.” What’s left is your seed.
Personal note: When I first built a list for a client’s sneaker line, I wrote down every word I could think of on a whiteboard. It felt like a game of word‑scrabble, and the best ideas came from the scribbles that looked like nonsense at first.

Step 3: Expand With Keyword Tools

Now feed those seeds into a keyword research tool. Google’s Keyword Planner is free and gives you search volume and competition. Other tools like Ubersuggest or Ahrefs work too, but keep the focus on data you can trust.

Look for:
- Long‑tail phrases (3‑5 words) that include buying signals such as “buy,” “discount,” “free shipping.”
- Brand + product combos, e.g., “Adidas ultraboost size 10.”
- Location modifiers if you ship regionally, like “running shoes Chicago.”

Step 4: Filter for Intent

Not every phrase that shows up is high‑intent. Use these quick checks:

Buy‑signal words – If the phrase contains “buy,” “order,” “price,” “discount,” it’s likely purchase‑ready.
Specificity – The more details (size, color, model), the higher the intent. “Red leather handbag” beats just “handbag.”
Commercial intent score – Some tools label keywords as “commercial.” Prioritize those.

Cross‑check each term against your product list. If a keyword mentions a feature you don’t sell, drop it.

Step 5: Group Into Tight Ad Groups

A clean keyword list is useless if your ad groups are a mess. Group keywords that share the same theme—same product type, brand, or attribute.

Example:
- Ad Group 1: “Men’s black leather boots size 9,” “Buy black leather boots men,” “Black leather boots cheap.”
- Ad Group 2: “Women’s black leather boots size 7,” “Women’s black boots sale.”

Keeping groups tight means your ad copy can match the search term closely, improving Quality Score and lowering cost per click.

Step 6: Add Negative Keywords

Negatives are the unsung heroes of PPC. They tell Google what NOT to show your ads for. Without them, you’ll waste money on irrelevant clicks.

Common negatives for e‑commerce: “free,” “DIY,” “how to,” “repair.”
How to find them: Run a quick search on the terms you’re bidding on and note any results that aren’t buying‑related. Add those to your negative list.

Step 7: Test, Tweak, Repeat

Even the best‑crafted list needs real‑world testing. Launch your campaign with a modest budget and watch the metrics for a week.

Key metrics: Click‑through rate (CTR), conversion rate, cost per acquisition (CPA).
What to look for: Keywords with high CTR but low conversion are likely attracting browsers. Pause or add negatives. Keywords with low CTR may need better ad copy or could be too niche—consider pausing them.

Every few weeks, revisit your list. Add new search terms that appear in the search terms report, and prune the ones that underperform.

Step 8: Keep an Eye on Trends

E‑commerce is fast‑moving. Seasonal trends, new product releases, and even cultural moments can shift intent.

Practical tip: Set a calendar reminder to review your keyword list before major holidays—Black Friday, Cyber Monday, back‑to‑school.
Personal anecdote: I once added “gift” to a list of kitchen gadgets just before Christmas. The conversion lift was immediate, and the client was thrilled.

Bonus: Use Customer Reviews for Inspiration

Your customers already speak the language you need. Scan reviews for phrases they use to describe the product. If a shopper writes “lightweight but sturdy,” add “lightweight sturdy” to your keyword pool. It’s a low‑effort way to capture real‑world intent.

Wrapping It Up

Building a high‑intent keyword list isn’t a one‑time chore; it’s a cycle of research, organization, and refinement. Start with what you know—your product catalog—then expand, filter, and group with a clear eye on buying signals. Add negatives, test, and stay on top of trends, and you’ll see your ad spend work harder, not just harder.

Remember, the goal isn’t just more clicks; it’s more clicks that end in a sale. Keep the list tight, the intent high, and the budget will thank you.