How to Do Keyword Research for Google Ads (Without Wasting Budget)

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Most wasted Google Ads spend traces back to one thing: keywords that match searches with no buying intent. Great keyword research isn’t about finding the most volume — it’s about finding the searches your best customers actually type.

Start with intent, not volume

Group every candidate keyword into one of three buckets:

• Transactional — “buy running shoes online”, “crm software pricing”
• Commercial — “best crm for small business”, “nike vs adidas running”
• Informational — “how to tie running shoes”, “what is a crm”

For a performance campaign, you live in the transactional and commercial buckets. Informational terms are for content and SEO, not for a cost-per-acquisition budget.

A repeatable workflow

1. Seed list — write down how you would describe the product as a buyer.
2. Expand — use the Keyword Planner, autocomplete, and your Search Terms report from any existing campaigns.
3. Cluster — group keywords into tight ad groups by meaning (one intent per ad group).
4. Prune — remove anything ambiguous, off-intent, or wildly broad.
5. Negatives first — build your negative keyword list before you launch, not after you’ve bled budget.

Match types in 2026

Broad match plus Smart Bidding can work, but only with strong conversion data and a disciplined negative list. If you’re starting cold, lean on phrase and exact match to keep control while you gather signal, then loosen up.

The metric that matters

Don’t fall in love with impressions. Judge every keyword on cost per qualified conversion. A keyword with 50 searches a month that converts is worth more than one with 50,000 that drains budget.

The Search Terms report is your source of truth — check it weekly and keep mining negatives.