Negative broad match (Google Ads): how it works

A negative broad match keyword in Google Ads blocks any query that contains the literal token, regardless of word order or surrounding context. Unlike positive broad match, it does not expand to synonyms or close variants. that asymmetry is the single most common point of confusion.

How it works

If you add free as a negative broad match keyword, Google will not show your ad for any query that contains the word "free" as a separate token.

Examples blocked:

• "free ac repair near me"
• "is plumber service free"
• "free quote phoenix"

Examples NOT blocked (different tokens):

• "freezing pipes". contains "freezing," not "free"
• "freebie". contains "freebie," not "free"

The asymmetry from positive broad

Positive broad match expands to synonyms and close variants by default. Bid on plumber as positive broad and the matcher will serve against "plumbing service," "pipe repair guy," and other related concepts.

Negative broad match does NOT do this. Add cheap as a negative broad and the matcher will not block "inexpensive," "low cost," or "budget." You have to add each synonym separately.

This catches almost every operator off guard the first time they use negative broad. The system is not broken; the rule is just different.

When to use it

Negative broad is the right choice when:

• The word is unambiguous in your account (free, salary, jobs, wholesale for B2C)
• Buyers do not use the word in legitimate queries
• One block can catch many variants of the same junk pattern

When to use phrase or exact instead

If the word has multiple meanings, use negative phrase match instead:

• parts is too broad. phrase-block "parts only" instead
• commercial is too broad if you sometimes serve commercial. phrase-block specific patterns
• used is too broad. phrase-block "used parts" or "used products"

How it does not catch close variants

Negative broad blocks the literal token. So if you add cheap, you do not automatically block cheaply or cheaper. Plurals and singulars are mostly handled (limited close-variant matching applies as of late 2024), but reliable blocking requires enumerating the variants.

For important blocks, add the variants explicitly: cheap, cheaply, cheaper, cheapest.

Related

• Match type comparison: broad vs phrase vs exact
• Common mistakes including over-blocking: common negative keyword mistakes