A business selling premium custom furniture doesn't want to pay for a click from someone searching "cheap furniture" or "free furniture plans." Negative keywords are how Google Ads lets you explicitly exclude searches like these — an often underused tool that can meaningfully improve how efficiently your ad budget is spent, sometimes with more direct impact than tweaking bids or ad copy.
Key takeaways:
- Negative keywords prevent your ads from showing for specific, irrelevant search terms
- They work at the keyword, ad group, or campaign level, offering flexible control
- The Search Terms report is the primary source for discovering new negative keyword candidates
- A well-maintained negative keyword list should evolve continuously, not be set once and forgotten
- Negative keywords are especially important for broad and phrase match campaigns
What Negative Keywords Actually Do
A regular keyword tells Google Ads when to show your ad. A negative keyword tells it explicitly when not to — even if the search would otherwise have matched one of your active keywords. This gives you a way to carve out irrelevant traffic without needing to abandon a broader keyword strategy entirely.
Where Negative Keywords Can Be Applied
| Level | How It Works | Best Used For |
|---|---|---|
| Keyword level | Applied to a specific ad group's keyword list | Excluding terms relevant to one specific product or service line |
| Campaign level | Applied across an entire campaign | Broad exclusions relevant to the whole campaign, like "free" or "jobs" |
| Shared negative keyword lists | A reusable list applied across multiple campaigns | Common exclusions relevant to the whole account, like competitor names |
Common Categories of Negative Keywords
- Price-signaling terms: "free," "cheap," "discount" — relevant to exclude for premium-positioned businesses
- Job-related searches: "jobs," "careers," "salary" — common false matches for many industries
- Educational or informational intent: "how to," "DIY," "tutorial" — worth excluding if you sell a done-for-you service, not instructional content
- Irrelevant geographic terms: Locations clearly outside your service area, if not already handled by location targeting
- Competitor brand names: Sometimes intentionally excluded (or intentionally included, depending on strategy)
Finding Negative Keyword Candidates: Step by Step
1. Review the Search Terms Report Regularly
This report shows the actual search queries that triggered your ads — reviewing it periodically reveals patterns of irrelevant traffic worth excluding.
2. Look for Low-Converting, High-Click Terms
Search terms generating clicks but rarely converting are strong candidates for negative keywords, especially once enough data has accumulated to be confident it isn't just normal variance.
3. Add Negatives at the Right Level
Decide whether an exclusion is relevant to a single ad group, an entire campaign, or your whole account, and apply it at the appropriate level to avoid redundant, scattered lists.
4. Build a Shared Negative Keyword List for Common Exclusions
For exclusions relevant across your entire account — like consistently irrelevant job-related searches — a shared list saves time compared to manually adding the same negatives to every campaign.
How This Connects to Match Types
Broader match types (covered in our dedicated match types guide) are more prone to matching loosely related, sometimes irrelevant searches. A strong negative keyword list is what makes broader match types usable without excessive wasted spend, rather than needing to rely solely on narrow exact match keywords for control.
Common Mistakes to Avoid
- Setting a negative keyword list once and never revisiting it: Search behavior and your own campaigns evolve — negative keyword lists should be reviewed and updated regularly.
- Being too aggressive with exclusions: Overly broad negative keywords can accidentally block legitimately relevant searches — review carefully before adding.
- Ignoring the Search Terms report entirely: This is the primary source of real data showing what's actually triggering your ads, and skipping it means missing obvious, wasteful matches.
- Not applying negatives at the account level for clearly universal exclusions: Repeating the same manual exclusions across every campaign is inefficient compared to a shared list.
Frequently Asked Questions
How often should I review and update negative keywords?
Many advertisers review the Search Terms report weekly or biweekly during active campaign management, tapering to a less frequent cadence once a campaign's negative list has matured.
Can negative keywords hurt my campaign if used incorrectly?
Yes — overly broad or mistaken exclusions can prevent your ads from showing for genuinely relevant searches, so additions should be based on actual data, not assumptions.
Do negative keywords cost anything to use?
No, there's no direct cost to adding negative keywords — the benefit comes indirectly, through reduced wasted spend on irrelevant clicks.
Next Steps for Your Business
A well-maintained negative keyword list is one of the simplest, most direct ways to make an existing ad budget work harder without increasing spend.
Our team can audit your Search Terms report and build out a proper negative keyword strategy, helping reduce wasted spend on searches that were never going to convert.