Negative Keyword Strategy

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Intermediate

Basic ML concepts helpful

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Static Playbook

Static guide & reference tables

Negatives Are Account Architecture, Not Cleanup

Treating negative keywords as a reactive cleanup task (checking the search query report once a month and negating a few bad terms) undersells what they actually do: negative keyword lists are a structural tool for controlling cannibalization between campaigns, protecting brand campaigns from generic traffic, and keeping broad/phrase match keywords from drifting into irrelevant territory. Mature accounts build negative lists deliberately, not just reactively.

The Three Negative Keyword Layers

1. Ad group level: Narrow exclusions specific to one ad group's theme, preventing internal cannibalization between ad groups in the same campaign.
2. Campaign level: Broader exclusions relevant to an entire campaign's intent — e.g. excluding 'jobs,' 'careers,' 'reviews' from a transactional campaign.
3. Shared negative lists: Account-wide lists (applied across many campaigns) for universal exclusions like competitor brand terms, adult content, or known irrelevant terms that have no business ever showing your ads — these should be applied consistently rather than re-built per campaign.

Negative Match Types Matter As Much As Positive Ones

A negative exact match on 'free shipping' only blocks that literal query. A negative phrase match blocks any query containing that phrase in order. Broad negative match blocks any query containing all the words in any order. Using the wrong negative match type is the single most common reason 'I already negated that' queries keep reappearing in the search query report.

Brand Protection Patterns

A critical, often-missed use of negatives: excluding your own brand terms from non-brand campaigns. Without this, a well-performing brand query can get served by a generic broad-match keyword in a non-brand campaign, artificially inflating that campaign's apparent performance while actually just cannibalizing cheap, high-intent brand traffic that should flow through a dedicated (much cheaper CPC) brand campaign.

shared_negative_list_structure.json

json

{
  "shared_negative_lists": [
    {
      "name": "Universal_Exclusions",
      "match_type": "broad",
      "terms": ["free", "jobs", "career", "reviews", "complaint", "diy", "cheap"],
      "applied_to": ["all_non_brand_campaigns"]
    },
    {
      "name": "Competitor_Brand_Block",
      "match_type": "phrase",
      "terms": ["competitor name a", "competitor name b"],
      "applied_to": ["generic_campaigns"]
    },
    {
      "name": "Own_Brand_Exclusion_For_NonBrand",
      "match_type": "phrase",
      "terms": ["your brand name"],
      "applied_to": ["non_brand_campaigns_only"]
    }
  ]
}

Building a Review Cadence

A weekly search query report pull paired with a quarterly deep audit of shared negative lists works well for most accounts. The weekly pass catches fresh noise before it accumulates spend; the quarterly audit catches negatives that have become stale or overly broad — sometimes a negative added for a seasonal reason (e.g. blocking 'holiday' terms in January) silently suppresses valid traffic months later if no one revisits it.

Negatives Can Silently Block Your Own Ads

A broad negative keyword can accidentally conflict with a positive keyword you're actively bidding on, especially after account restructuring. Google Ads will flag some conflicts in the UI, but not all — periodically audit for overlap between your negative lists and active keyword lists, particularly after large campaign restructures.

What's Next?

Negative keyword hygiene is foundational SEM discipline, but it only addresses waste — not growth. Pairing it with disciplined ad copy testing is the next step toward improving the performance of the traffic you do keep.

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