Google Ads Negative Keywords and Search Terms for Ecommerce 2026

The average Google Ads account spends 20%–40% of its budget on irrelevant queries (a share that's been climbing as matching gets broader). Stopping that waste isn't complicated: regularly mine the search terms report and keep adding junk queries to your negative keyword list. It's one of the highest-return daily actions in Search. This piece shows you how — plus the special handling the PMax lane needs.

Negative keywords aren't an optional "cleanup after the fact" — they're a structural piece built in parallel with your match strategy, because even close-variant exact match triggers queries that surprise you. For the overall logic of match types, see Google Search ads and keyword strategy for ecommerce.

Step 1: mine the search terms report correctly

The Search Terms report is the only place in your account that shows "what users actually typed" — which is not the same as the keywords you set. Mine it in this order:

1. Sort by Cost, descending. Look at the priciest queries first, not from the top of an alphabetical list.
2. Focus on two query types: zero conversions but significant spend; and CPA (cost per conversion) more than 2x your account average. These two are the bulk of the waste.
3. Judge intent one by one: is the person searching this genuinely after what you sell, or did they search off-target? Off-target ones are negative candidates.
4. Don't over-kill. Some queries convert poorly on their own but sit in the "commercial research" stage and may be planting a seed. Before cutting, place it on the intent chain.

Cadence: for a new campaign or after a big change, look daily; once stable, weekly. The sooner you block junk queries, the more you save.

Step 2: build a layered negative keyword list

A negative keyword list isn't one big bucket — it's layered:

• Account-level / shared negative lists — generic terms you never want anywhere: "free," "crack," "hiring," "how to," "tutorial," "used / second-hand." Maintain once, applies account-wide.
• Campaign-level negatives — block queries that shouldn't enter a specific campaign based on its purpose.
• Ad-group-level negatives — fine traffic sculpting, e.g. blocking "running shoes" queries from your "basketball shoes" ad group to avoid internal cannibalization.

Ecommerce accounts typically need 200+ negatives across all levels. The good news: in 2026 the per-campaign negative keyword cap rose sharply from 100 to 10,000, so you have plenty of room for fine control.

Common ecommerce negative directions:

• Free / freebie terms — basically never convert.
• Informational / tutorial — "what is," "how to use," "review" — unless you sell courses or nurture with content.
• Extreme bargain-hunting — if you don't compete on price, these convert poorly and return often.
• Irrelevant categories / wrong intent — block searches unrelated to your products.
• Jobs / competitors (strategy-dependent) — depends on whether you bid competitor terms.

Step 3: manage negatives and their side effects together

Adding negatives works fast: most ecommerce stores see CTR jump ~10%–15% right after their first negative cleanup (the exact range varies by category, so rely on your own dashboard measurement). Higher CTR feeds Quality Score, and Quality Score lowers your actual CPC — a virtuous loop. If your Quality Score has been stubbornly low, start with why ecommerce Quality Score is low and how to fix it.

But watch out for collateral damage:

• Negatives conflict / overlap with each other — add too many and you may block the high-intent queries you actually wanted.
• Exact vs phrase vs broad negatives mean different things — broad negatives over-kill most easily (they match any query containing the words, order-independent), so think before using.
• In 2026 also watch potential conflicts between negatives and AI Max — AI Max uses landing-page / feed content to match conversational queries, and over-negating can suppress its exploration. Verify the specific behavior in Google Ads.

The PMax special case: what to do about limited visibility

This is the easiest 2026 trap: PMax can't add negatives freely at the campaign / ad-group level the way Search campaigns can, and its search-terms visibility is far lower than Standard Shopping's.

How to handle it:

• PMax now supports campaign-level negative keywords (with the same 10,000 cap raised), but the way you add them isn't identical to Search campaigns — verify exactly where to add them and which match types are supported in Google Ads.
• Search-terms insights are limited — the granularity you see is less than Standard Shopping's. This is one reason many advertisers keep a Standard Shopping campaign to guard hero products — to reclaim query-level visibility and negative control. Whether to split this way: see PMax vs Standard Shopping.
• Constrain PMax with conversion data — with low visibility, PMax leans even harder on accurate conversion feedback to steer the AI away from junk traffic. When tracking is inaccurate, no amount of negatives saves you.

Make it a routine

The value of negative keywords is in consistency, not a one-off sweep:

• New campaign / after a big change — mine the search terms report daily.
• Stable operation — mine at a fixed time weekly, add that week's junk queries.
• Quarterly — review the negative list, delete the obsolete, merge overlaps, avoid over-killing.

To work out how much you actually saved and how much ROAS improved after stopping the waste, use our free tools. For the overall Google structure, see the hub: the complete Google Ads guide for ecommerce.

Frequently asked questions

How often should I mine the search terms report? For a new campaign or after a big change, daily; once stable, at a fixed time weekly. Sort by cost descending and prioritize zero-conversion high-spend queries and those with CPA over 2x your account average.

Are more negative keywords always better? No. Too many — especially broad negatives — easily over-kill high-intent queries. Manage in layers (account / campaign / ad group) and review quarterly to delete obsolete and overlapping ones.

Can PMax take negative keywords? Yes — in 2026 PMax supports campaign-level negative keywords, with the cap raised to 10,000, but the way you add them differs from Search campaigns, and search-terms visibility is lower. Verify where to add them and which match types are supported in Google Ads.

How fast do negatives show results? Usually fast. Most ecommerce stores see CTR jump ~10%–15% right after the first negative cleanup, feeding Quality Score and lowering CPC (rely on your own dashboard measurement).

Bottom line

The core loop for stopping Google Ads waste is one sentence: mine the search terms report by cost → add junk queries to a layered negative list → review periodically to avoid over-killing. Ecommerce accounts typically need 200+ negatives, and with the 2026 cap at 10,000 there's plenty of room. PMax's visibility is limited — either use its newly supported campaign-level negatives, or keep a Standard Shopping campaign to guard hero products and reclaim control. Verify all specific caps and match behavior in Google Ads.