The Complete Guide to Negative Keywords in Google Ads

Negative keywords are the fastest lever most Google Ads accounts leave unpulled, they don't need a bigger budget or better creative to work, just an accurate list of what your ads shouldn't show for. A well-maintained negative keyword strategy routinely cuts wasted spend by a meaningful share of an account's total budget without touching a single bid. Here's the complete guide: match types, list structure, and how to actually find negatives instead of guessing at them.

The Three Negative Match Types

Step-by-Step: Building Your First Negative Keyword List

1. Pull your Search Terms report. In Google Ads, go to Keywords, then "Search terms," and sort by cost descending, this shows you exactly what real searches triggered your ads and how much each one has spent.
2. Identify terms with spend and zero conversions. Any search term with meaningful cost and no conversions over the last 30 to 90 days is a candidate, but check intent first, some legitimately take longer to convert.
3. Group by pattern, not just individual terms. If you see "free," "cheap," and "discount" all showing up as irrelevant, that's a pattern worth a broader negative rather than three separate exact-match entries.
4. Create a shared negative list. Under Tools and Settings, Shared Library, Negative keyword lists, build a list you can apply across every relevant campaign at once, rather than adding the same negatives to each campaign individually.
5. Apply the list to your campaigns. A shared list does nothing until it's actively linked to campaigns, this step gets skipped more often than you'd expect.
6. Review and repeat weekly for new accounts, monthly once mature. New search query patterns emerge constantly, especially after adding new keywords or expanding match types.

Where to Actually Find Negatives, Beyond Just Zero Conversions

• Job seekers and researchers. "salary," "how to become a," "jobs," "what is" often indicate someone researching a career or a concept, not a buyer, common negatives across almost any B2B or service account.
• Competitor names, if you don't want that traffic. Some businesses deliberately bid on competitor names, others find that traffic converts poorly and excludes it, decide this intentionally rather than by default.
• Free and DIY intent. "free," "template," "diy," "tutorial" signal someone looking to avoid paying for exactly what you sell, relevant for most service and SaaS businesses, less relevant if you genuinely offer a free tier.
• Wrong geography. If you serve one country or region, city and country names outside your service area showing up in the search terms report are an easy, obvious cut.

Common Mistakes

• Using negative broad when phrase or exact would be safer. Negative broad's word-order flexibility can block legitimate searches you didn't anticipate, default to phrase match unless you've specifically checked broad's blocking pattern.
• Building the list once and never revisiting it. New irrelevant search patterns appear constantly as your keyword list grows or seasonal search behavior shifts, a negative list from six months ago is already stale.
• Negating a term that's also one of your actual keywords. A negative keyword that conflicts with a positive keyword in the same campaign silently blocks your own ad from showing, always cross-check before adding a broad negative.

Frequently Asked Questions

How many negative keywords should an account have?

There's no fixed target, mature accounts in competitive verticals often run negative lists in the hundreds or low thousands of terms, built up gradually rather than all at once.

Do negative keywords affect Quality Score?

Not directly, but by preventing your ad from showing on irrelevant searches, they indirectly protect your CTR and relevance signals from being diluted by clicks that were never going to convert.

Can I add negative keywords to Performance Max?

Limited support exists at the account level and through account-level exclusion lists, but PMax doesn't support the same granular negative keyword control as Search campaigns, this is a known limitation worth planning around.

A negative keyword list built once from a single search terms report review catches the obvious waste, but the search terms that actually cost you money shift as your account, your market, and seasonal behavior all change. If you want your account's negative keyword strategy built and maintained properly instead of reviewed once and forgotten, our Google Ads team can set up the ongoing process.