Performance Max Negative Keywords: Scope, Match Types and Review

A negative keyword changes eligibility, and only that

An appliance repair business does not want every search about appliances. Someone searching for a repair manual probably wants instructions, not a technician; that is a plausible candidate for exclusion. Someone searching for repair prices is a prospective customer. The difference is commercial intent, not how the query looks in a report.

Google's Performance Max guidance describes campaign negatives as a restrictive control, recommended for terms that are wholly irrelevant or that raise brand safety needs. That framing is useful: the question is which searches the advertiser should never enter, not which searches have not converted yet.

A negative takes the campaign out of one set of auctions. Whether the money then finds better auctions, stays unspent, or lands in another channel depends on what else the campaign can serve. So write the exclusion as a constraint you want the campaign to obey, and judge it later by conversions and value, not by the spend line moving.

If the only argument for a negative is that a relevant term has not converted, look at conversion delay and volume before turning uncertainty into a permanent block.

Pick the control that matches the problem

For unwanted intent inside one campaign, a campaign negative is the right size. For a rule that applies across every Search and Shopping campaign the advertiser runs, an account-level negative keyword does it once; Google documents that account-level negatives apply to all Search and Shopping inventory, Performance Max included, with a limit of 1,000 per account. Use the broad scope because the rule is broad, not because it is quicker.

For branded searches, use brand exclusions. Google recommends them over a hand-built negative list for excluding your own, a partner's, or a competitor's brand, because a brand list covers variants a keyword list will miss. Brand exclusions live in the campaign's other settings and need a brand list first.

For a placement or content concern, use content suitability settings or account-level placement exclusions. Performance Max negatives do not reach YouTube or Display, so a negative keyword cannot solve a placement problem, however tidy it looks.

Work from actual reported search terms, the offer, and the landing pages. Performance Max now has a search terms report with individual reported queries. Search terms insights are a separate view organized into categories; those category labels are not searches to upload as negatives. Privacy limits still mean that neither an export nor an API response reveals every query.

Check the match type against searches you want to keep

Negative match types work differently from positive keyword matching: they do not expand to synonyms or close variants. Read Google's negative keyword matching page once, then test each candidate against a search the advertiser wants and a search it does not.

Take the hypothetical phrase repair manual. As a broad negative, it blocks any search containing both words in any order. As a phrase negative, it blocks searches containing the two words in that order, with anything before or after. As an exact negative, it blocks that query alone. Each version removes a different set of possible customers.

Do not shorten the candidate to the single word repair unless the business genuinely wants to lose repair searches. A shorter list can look cleaner while being commercially absurd.

Keep an example the negative should block and an example it must not block beside every candidate. That makes the review concrete in a way a low intent label never is.

Apply the reviewed change to the intended campaign

Go to the Keywords tab under Campaigns, open Negative keywords, click the plus, choose the Performance Max campaign, and either enter the terms with their match type symbols or select an existing negative keyword list. Save.

Before that last click, look at the account-level list and any shared list attached to the campaign. A campaign entry, an account-level rule, and a shared list are three different objects; write down which one you are changing.

If Google shows an impact estimate in the account, read it as context. The business still has to agree that the excluded intent is unwanted.

Keep the review proportional. A plainly irrelevant query does not need weeks of spend before you exclude it. A broad term that overlaps valuable products deserves a closer look however many times it has appeared.

In Parallel, ask for the proposed text, the match type, and the exact scope in the review. Preparing the candidates and explaining the risk is analysis; applying the change to the campaign is the separate step a person approves.

Confirm the exclusion, then watch the outcome

First confirm the negative exists at the intended level. Then check the search terms view for the pattern it was meant to block, allowing for report timing and remembering that the absence of a row is not complete proof.

Judge the result on valuable conversions and value as well as cost per conversion or return on ad spend. A lower cost per conversion with far fewer useful leads is not a better campaign. Give conversions time to mature before reading recent traffic.

Keep campaign and business changes on the same timeline. If a promotion ended during the window, the negative batch does not own the whole difference. A before-and-after comparison informs the next decision; it does not measure the exclusion.

If a candidate turns out to block useful intent, remove or narrow that exact exclusion, then check for an account-level or shared-list rule that still blocks the query. Removing one duplicate does not always restore eligibility.

Set the review window from the sales cycle and the volume. There is no standard number of days that makes every Performance Max exclusion safe.