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How many negative keywords per month: a review routine, not a quota

By Abhishek Pal, performance marketer (apships.com). Last updated 2026-11-01.

Add only the negative keywords you can justify from the business and its search data. I would set a monthly review appointment, not a quota for exclusions. A review that finds nothing to block can be complete. A long list with no reason beside each entry still needs work.

Why a giant generic list can hurt

A generic list cannot know whether your shop offers repairs, trade orders, training or free delivery. Those words can describe unwanted traffic in one account and the offer itself in another. Pasting the same exclusions into both accounts ignores that difference.

Google specifically warns that negatives overlapping with regular keywords can stop ads showing. That is a reason to inspect conflicts before saving. See Google's instructions for adding negative keywords.

Example: a store that sells repair kits should question an inherited exclusion for repair searches. The entry might have made sense for a different retailer. In this account, keeping it without review could remove demand for a product the shop stocks.

I would ask whoever owns the list to explain each theme in a sentence. "We do not sell this" is a useful starting reason. "It was in a template" tells me the business check has not happened yet.

Use a monthly routine you can finish

  1. Export a consistent period. Keep the dates, campaign names and relevant performance columns with the file. Use the export guide so the next review can be compared with this one.
  2. Check the offer first. Mark searches for products, services or buying arrangements the business does not provide. Read the whole query before deciding that a word is irrelevant.
  3. Separate relevance from performance. A clearly wrong service and a relevant search with no recorded sale need different reasoning. Write down which problem you are trying to solve.
  4. Apply the protections below. Pull protected terms out of the rejection pile before choosing negatives.
  5. Add only justified exclusions. Record the reason, match type, destination and date. Use the match-types guide to choose how much wording to exclude.
  6. Keep a watchlist. Give each uncertain term a reason for waiting and a next review date. Revisit it alongside new queries next month.

This is a review cadence, not a rule to ignore an obvious mismatch until month-end. If a campaign starts promoting a new offer or spending changes sharply, bring the review forward. Keep the same decision standard even when the timing changes.

Keep these terms out of routine rejection

Converting terms: protect searches with recorded outcomes while checking what those outcomes mean. A low-quality lead or low-margin sale may still need work, but that is a separate decision. Do not erase conversion evidence simply because the query looks untidy.

Brand terms: hold them for a deliberate review of the campaign's purpose. Branded searches may involve existing customers, offers or comparisons. Decide how that demand should be handled before excluding it.

Live keywords: stop when a proposed negative conflicts with something you are actively targeting. Resolve the disagreement with the keyword strategy first. An intentional change to that strategy needs an explanation, rather than slipping through as list maintenance.

These are manual-review guardrails. They make the uncertain decisions visible and prevent a batch operation from quietly deciding which products or customers the account should pursue.

Enough clicks to learn is different from a deadline

For a relevant term with no conversions, ask whether it has had a reasonable chance to produce an outcome at the campaign's usual rate. Compare similar traffic and the same conversion goal. A blended average from unrelated campaigns is a weak benchmark.

Conversion delay matters too. Google explains that recent results can look worse because people who clicked have not yet converted. Check the account's history before calling those clicks unproductive. See Google's conversion-delay guidance.

Hypothetical example: suppose a comparable campaign converts 5% of clicks. At that rate, 20 clicks correspond to 1 expected conversion on average. A term with 20 clicks and no conversions has not automatically failed. An average is not a schedule every term must follow.

At 100 clicks, the same rate corresponds to 5 expected conversions. If the term still has none, tracking works and the conversion window has matured, there is more reason to investigate. Check the search intent, landing page and offer before deciding whether to exclude it. This arithmetic is a review prompt, not a universal statistical cutoff.

Leave a decision trail for next month

Keep the search text, reason, evidence still needed and next review date together. Add the final match type and scope when you approve an exclusion. Google allows a shared list to serve multiple campaigns, so inspect every affected campaign before changing that list. See Google's list guidance.

Start with the free browser check for a browser-only summary and the three most expensive suggested negatives. Use the search-term review for the $39 full report and a file to review before adding exclusions. The useful output is a set of decisions you can explain, whatever its length.

Questions

What is a good monthly negative-keyword target?
Use a review target rather than a count of additions. Review the relevant search terms, document justified exclusions and revisit uncertain terms. A completed review can produce no new negatives.
Should I exclude every term with no conversions?
No. Consider relevance, click volume, the campaign's conversion rate, conversion delay and tracking quality. A relevant term needs enough evidence before poor performance becomes a reason to consider exclusion.
Which terms should stay out of the automatic rejection pile?
Protect converting terms, brand terms and terms that conflict with live keywords. Send these for a deliberate business review before any exclusion. Those guardrails do not claim that every protected term is profitable.
Can I start with a generic negative-keyword list?
Use it as a source of candidates. Check each candidate against your offer and actual searches. Broad generic exclusions can remove customers you want, especially when they overlap with your active keywords.

Sources

Have an export ready? The search-term review finds the wasted spend in it for free. The full report is $39. Run it on your file.

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