Google Ads Match Types: Broad, Phrase and Exact Explained

Google Ads match types are the setting on each keyword that decides how closely a search must relate to that keyword before your ad can show. There are three: broad match (no symbols, the widest), phrase match (quotation marks, in the middle) and exact match (square brackets, the narrowest). Broad is the default, and Google's help documentation says broader match types capture all the queries of narrower ones, plus more.

This guide explains what each of the three Google Ads match types does today, how they behave with Smart Bidding and AI Max, how negative keywords work differently, and how to read the search terms report to check whether a match type is doing what you intended. The behaviour described comes from Google Ads Help; the recommendations are analysis and are labelled as such.

The three Google Ads match types at a glance

Each keyword in a Search campaign carries one match type. The match type does not change the keyword text; it changes the range of searches that can trigger your ad. Google's current wording for the three types is the best starting point, because many older guides still describe rules that no longer apply.

Broad match

Broad match is the default when you type a keyword with no symbols. Google states that ads may show on searches that are related to your keyword, which can include searches that do not contain the direct meaning of the keyword.

Google also says broad match looks at more than the keyword itself. It factors in the user's search history, the content of your landing page and the other keywords in the same ad group when it decides whether a query is relevant. That last point matters for account structure: the keywords you group together change what a broad keyword is allowed to match.

Phrase match

Phrase match uses quotation marks, for example "tennis shoes". Ads may show on searches that include the meaning of your keyword. It reaches more searches than exact match and fewer than broad match, which makes it the usual middle step when you want to cover a product or service while still keeping the core idea of the keyword in the query.

Exact match

Exact match uses square brackets, for example [red shoe]. Ads may show on searches that have the same meaning or the same intent as the keyword. Google describes it as giving you the most steering over who sees your ad, with the trade-off that it reaches fewer searches than phrase or broad.

The word "exact" is the source of a common misunderstanding. Exact match no longer means the query must be letter-for-letter identical to the keyword. It means the query must carry the same meaning or intent, so close variants of the keyword can still trigger the ad.

How the match types relate to each other

Google's hierarchy is simple: a broader type captures every query a narrower type would, plus others. If you hold the keyword low carb diet plan as broad, the searches that exact match would have caught are already eligible. One broad keyword can therefore stand in for several narrower ones, which is the reason Google promotes broad match so heavily.

Eligibility is not the same as which keyword wins. When a search query is identical to an eligible exact match keyword in your Search campaign, Google's documentation says that exact keyword is prioritised over other broad or phrase keywords (and over Performance Max). In practice this means adding an exact version of a proven query is a way to route that query to a specific keyword, ad and bid, even while broader keywords stay in the account.

This also explains why duplicate keywords across match types are not automatically a mistake. A broad keyword and an exact keyword with the same words can coexist because the exact one takes the identical query and the broad one handles the rest. The mistake is leaving them with the same ad and the same bid logic, because then the split achieves nothing.

Match types with Smart Bidding

Google's help page says it is critical to use Smart Bidding with broad match. The reasoning is mechanical. Broad match opens the account to queries that differ widely from one another, and Smart Bidding sets the bid for each auction using context signals at the time of the search. Without it, a manual bid on a broad keyword applies the same price to a very mixed set of queries, some close to the product and some far from it.

Two practical conditions follow from this, and both are things to verify in your own account rather than assume:

• Conversion tracking must be accurate. Smart Bidding learns from the conversions you report. If the primary conversion action counts low-value events such as page views or button clicks, broad match will expand toward cheap, easy-to-trigger conversions.
• The bid strategy must be conversion-based. Google describes the broad match campaign setting as available only to campaigns using conversion-based Smart Bidding strategies.

For phrase and exact keywords the dependency is weaker. They can run on manual or automated bidding, because the range of queries is narrower and a single bid is less likely to be wrong by a wide margin. Whether to automate bids on narrow keywords is a separate question from match type and depends on how much conversion data a campaign has.

The broad match campaign setting

Google offers a campaign-level setting that makes a Search campaign use broad match exclusively. According to Google's help page, turning it on converts existing phrase and exact keywords into broad match and makes any keyword added afterwards broad as well. Keywords in those campaigns are prioritised as if they were both exact and broad, so a query identical to the keyword is handled like an exact match, which helps when comparing performance after moving from exact to broad.

The same page states that, starting in September 2026, campaigns using the campaign-level broad match setting will automatically be upgraded to AI Max. Because this is a scheduled change by Google, check the current status of your own campaigns in the account rather than relying on this paragraph.

Match types with AI Max for Search

AI Max for Search campaigns adds a layer on top of keywords. Google's documentation describes it as turning on search term matching, which expands beyond your existing keywords using broad match and keywordless technology, learning from your keywords, creative and landing page URLs. It also offers text customisation (generating customised headlines and descriptions from your existing ads, landing page and assets) and final URL expansion (sending traffic to the landing page predicted to fit the query best, which requires text customisation to be on).

Three points from Google's documentation affect how you think about match types once AI Max is involved:

• AI Max works alongside exact, phrase and broad keywords. It does not delete them.
• When converting a campaign that used the broad match setting to AI Max, broad keywords are not treated as exact match keywords in prioritisation. To keep the earlier prioritisation, Google says to add exact match copies of those keywords in the new AI Max campaign.
• The search terms report shows "AI Max" as a match type indicator, plus source columns that tell you whether a query came from broad match expansion or from keywordless matching.

The analytical point: with AI Max on, the match type of your keyword is only one of several reasons a query can appear. Reading the search terms report matters more, not less, because the report is the only place that shows which route a query took.

Negative keywords use different rules

Negative keywords also have broad, phrase and exact types, but they do not behave like their positive counterparts. Google's documentation gives these definitions:

• Negative broad: the ad will not show if the search contains all of your negative keyword terms, even in a different order. If only some of the terms appear, the ad can still show.
• Negative phrase: the ad will not show if the search contains the negative terms in the same order. Extra words around them do not stop the exclusion.
• Negative exact: the ad will not show if the search contains the exact terms, in the same order, with no extra words. Adding words to the search lets the ad show.

The most important rule is that negative keywords do not match close variants or other expansions. Google's example: if you exclude "flowers", your ad can still appear for "red flower". Negative lists therefore have to include plural, singular and synonym forms you want blocked, entered one by one. This is the reason a broad keyword plus a short negative list can leak spend: the positive side expands, the negative side does not.

Reading the search terms report

The search terms report is where a match type shows what it actually did. In Google Ads it sits under Campaigns, then Insights and reports, then Search terms. It lists the searches that triggered your ads on the Search Network, and its match type column describes how closely each search relates to the keyword that triggered it.

One detail catches people out. The match type column describes how the search relates to the keyword, which is not always the same as the match type you set on the keyword. A search can appear as an exact match for a keyword you set to broad, because the query happened to be identical or near-identical to it. For that reason, do not read the column as a report on your settings; read it as a report on the query.

The report also has a built-in limit. Google excludes search terms without enough query activity, to keep to its data privacy standards, so low-volume searches do not appear individually. Search terms insights may group them into themes. Anything you decide from the report is therefore based on the visible part of the traffic, not all of it.

A repeatable review routine

1. Filter to one campaign and sort by cost, so the queries that spent the most come first.
2. For each expensive query, check intent. Does the person plausibly want what the landing page sells?
3. Mark irrelevant queries as negatives at the right level. Use phrase negatives for a recurring word, exact negatives for a single bad query, and remember plurals and variants have to be added separately.
4. Mark queries that converted and are not yet a keyword as candidates for an exact or phrase keyword with its own ad copy.
5. Repeat on a schedule. The first review after a match type change is the most informative one.

When to use which match type: an illustrative example

The following is a made-up example to show the logic, not data from any account. Suppose a Bangkok clinic runs a Search campaign for a service called "dental implants". The numbers are illustrative only.

A reasonable build, framed as analysis rather than a rule: begin with exact and phrase keywords on terms where intent is clear, make sure conversion tracking reflects real leads, then add broad match in a separate campaign or ad group with Smart Bidding and a negative list, so its results can be read apart from the narrow keywords. Separating them gives you a clean comparison. Mixing all three in one ad group makes it hard to tell which type produced which result.

Common mistakes and what each one costs

• Broad match with manual bidding. Google calls Smart Bidding critical for broad match. A flat bid across a wide query range is the setup most likely to waste budget.
• Treating exact match as letter-for-letter. Because exact match can match same-intent variants, a negative strategy that assumes only the identical query appears will miss traffic.
• Short negative lists on a broad account. Negatives do not match close variants, so each variant has to be added.
• Judging a match type by the keyword setting, not the query. The search terms report is the evidence; the keyword list is only the intention.
• Counting weak events as conversions. Smart Bidding optimises toward whatever you tell it counts, and broad match widens the reach of that mistake.
• Ignoring landing page content. Google says broad match uses landing page content as a relevance signal, so a vague page widens what the keyword can match.

What this means for Thai marketers

The following is analysis, not something Google has said about Thailand. Thai searches often mix Thai script, English brand or product terms and transliterations, and Thai text is written without spaces between words. Those facts make it worth checking the search terms report for Thai-language and mixed-language queries specifically, rather than assuming a keyword set built in English behaves the same way in Thai.

Three checks are useful in a Thai-market account. First, list the Thai spellings and transliterations of your core terms and confirm each has its own keyword or is clearly covered by a broader one. Second, review whether Thai queries trigger the same ad group as English ones, because the intent may differ. Third, if broad match or AI Max is on, sort the search terms report by Thai-language queries and read a sample, since automated matching can reach terms you never wrote.

If you would like a second opinion on how your account's match types, bidding and negative lists fit together, Relevant Audience runs a Google Ads management service and a separate Search-focused Google Ads service. A sound landing page also feeds broad match relevance, which is the subject of the landing page design service.

Google Ads match types FAQ

What are the three Google Ads match types?

The three match types are broad, phrase and exact. Broad has no symbols and reaches the widest range of related searches, phrase uses quotation marks and matches searches that include the meaning of the keyword, and exact uses square brackets and matches the same meaning or intent. Broad is the default for a new keyword.

Does exact match only trigger on the identical search?

No. Google's current definition says exact match can show ads on searches with the same meaning or the same intent as the keyword, so close variants can trigger it. It still reaches fewer searches than phrase or broad, and it gives you the most control over who sees your ad.

Do I need Smart Bidding to use broad match?

Google says it is critical to use Smart Bidding with broad match, because the queries vary widely and each auction needs its own bid. The broad match campaign setting is available only on campaigns that use conversion-based Smart Bidding strategies.

Do negative keywords match close variants?

No. Google states that negative keywords do not match close variants or other expansions, so excluding "flowers" does not stop an ad showing for "red flower". Add singular, plural and synonym forms of any term you want blocked.

How do I see which match type triggered a search?

Open the search terms report under Campaigns, Insights and reports, Search terms, and read the match type column. It shows how closely each search relates to your keyword, and in AI Max campaigns it also shows "AI Max" with source columns for broad match expansion or keywordless matching. Low-volume searches are not listed individually.