Dynamic keyword insertion: when it works, when it backfires, and how to use it properly

If you've been managing Google Ads for any length of time, you've almost certainly come across dynamic keyword insertion. It's one of those features that gets talked about a lot, is sometimes held up as a magic bullet for improving click-through rates, and sometimes blamed for embarrassing ad copy disasters.

The truth, as with most things in paid search, sits somewhere in the middle. DKI Google Ads is a genuinely useful tool when it's used deliberately and appropriately. But deploy it carelessly and it can make your ads look spammy, confusing, or worse - legally problematic!

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Let's dig into it.

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What Is Dynamic Keyword Insertion?

Dynamic keyword insertion (DKI) is a Google Ads feature that automatically updates your ad text to include the keyword that triggered your ad. Instead of writing a static headline, you insert a special piece of code: {KeyWord:Default Text}, and Google replaces it with the search term from your keyword list that matched the user's query.

So if someone searches "women's running shoes" and you're bidding on that keyword, your headline could automatically update to read: Women's Running Shoes.

That's the core mechanic., but as with anything in Google Ads, the devil is ALWAYS in the detail.

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How Dynamic Keyword Insertion Works in Practice

The syntax looks like this:

{KeyWord:Your Default Text}

The capitalisation of "KeyWord" controls the capitalisation of the inserted text:

• {keyword:default} → all lowercase
• {Keyword:Default} → sentence case (first word capitalised)
• {KeyWord:Default} → title case (each word capitalised)
• {KEYWORD:DEFAULT} → ALL CAPS

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The text after the colon is your fallback, so it appears when the keyword is too long to fit in the character limit, or when insertion isn't possible for another reason.

This fallback text is not optional. Choosing it carefully is one of the most overlooked steps when setting up DKI Google Ads campaigns.

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Some Dynamic Keyword Insertion Examples

Here are some practical dynamic keyword insertion examples to illustrate how this can play out across different account types.

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Example 1: E-commerce - works well

An online retailer bidding on product-specific terms:

• Keyword: blue running shoes women
• Ad headline using DKI: {KeyWord:Running Shoes}
• Displayed as: Blue Running Shoes Women

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The ad is highly relevant to the search, matches the user's intent, and the inserted text reads naturally.

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Example 2: Service business - works with care

A solicitors firm bidding on legal service terms:

• Keyword: Manchester family lawyer
• Ad headline: {KeyWord:Family Law Solicitors}
• Displayed as: Manchester Family Lawyer

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This works, but needs tight keyword grouping and careful review. Legal services carry strict advertising regulations and you cannot afford to have DKI pull through something inaccurate or misleading.

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Example 3: B2B software - often backfires

A SaaS company bidding broadly across a wide keyword list:

• Keyword: easy crm with reporting
• Ad headline: {KeyWord:CRM Software}
• Displayed as: easy crm with reporting

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This is grammatically looks a bit awkward, and looks unpolished. It's exactly the kind of output that damages credibility rather than boosting it.

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When DKI Works Well

Used correctly, DKI Google Ads can deliver real performance gains. Here's where it tends to work:

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Tightly themed ad groups DKI performs best when your keywords within an ad group are closely related and naturally fit within a headline. If your keywords are consistent in length, tone, and structure, the inserted text will read coherently.

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High-volume, product-led campaigns Retail, e-commerce, and comparison-style searches are natural fits. Users searching for specific products are often highly intent-driven, and seeing their exact search term reflected in your ad can increase relevance and CTR.

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Supporting Quality Score By improving the match between ad copy and search query, DKI can contribute to a higher Quality Score, which in turn affects your ad rank and cost per click. This is one of the more legitimate performance arguments for using it.

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Scaling ad relevance without writing hundreds of ads For large accounts with extensive keyword lists, DKI reduces the manual effort required to maintain headline relevance across ad groups. This is where it genuinely saves time without sacrificing quality. If your keyword structure is clean that is!

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When DKI Backfires

This is the section most training courses skip over, but it's arguably the most important.

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Awkward or grammatically broken headlines If your keywords include long-tail phrases, question-based queries, or natural language terms, the inserted text will often read strangely or break completely. "Reduce My Energy Bill" is not a good headline. It looks like a mistake.

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Capitalisation issues Not all keywords capitalise well in title case. Brand names, abbreviations, place names, and technical terms can all look wrong when DKI applies its capitalisation rules. Always review your keyword list through this lens before enabling it.

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Sensitive or regulated industries Healthcare, financial services, and legal sectors should treat DKI with significant caution. Accuracy matters enormously. A dynamically inserted term that overpromises, misrepresents a service, or creates compliance issues is a serious risk.

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Inconsistent brand voice If you've worked hard to establish a specific brand tone (i.e. precise language, controlled messaging, a distinct personality), DKI can undermine it very quickly. Not every business should prioritise keyword mirroring over brand coherence.

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Competitor keyword lists This one deserves its own section entirely.

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Can You Use a Competitor's Name in Google Ads with DKI?

This is one of the most common questions I get asked, and it's also one of the most misunderstood areas of paid search.

The short answer: using a competitor's brand name as a keyword (bidding on it) is generally permitted. Using that competitor's brand name in your ad copy, including via dynamic keyword insertion, is almost always not.

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Google Ads Trademark Policy

Google Ads trademark policy distinguishes between using a trademarked term as a keyword versus using it in the visible ad text.

Bidding on a competitor's brand keyword is, in most cases, allowed. Google permits advertisers to bid on trademarked terms as keywords, even if they don't own the trademark. This is competitive bidding, and it's a legitimate strategy when done carefully.

However, using a competitor's trademarked name in your ad copy is a different matter. If a trademark owner has filed a complaint with Google, those terms become restricted. Attempting to insert a competitor's name into your headlines, whether manually or via DKI, will typically result in your ad being disapproved or the affected keyword being removed from your campaign.

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Why DKI Makes This Riskier

Here's where DKI and competitor targeting intersect in a way that catches people out.

Imagine you're running a campaign targeting competitor keywords. You have keywords like [CompetitorName] alternative or [CompetitorName] pricing in your list. If you've applied DKI to that ad group, Google may attempt to insert those competitor names into your headline, which would then violate Google Ads trademark policy and get your ads disapproved.

This is one of the clearest examples of DKI creating compliance risk through automation. The campaign manager may not even realise it's happening until ads start disapproved en masse.

The rule of thumb: never apply DKI to ad groups that contain branded or competitor keywords. Segment these campaigns separately and write the ad copy manually.

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Does AI Max Change How You Should Think About DKI?

There's nothing more topical than AI Max for Google Ads right now; it's already changing so much about how Google operates, and DKI is no exception, but perhaps not in the way you might expect

AI Max doesn't just make DKI less useful, if you're running both simultaneously having it switched on can actively damage your campaign performance.

This is because AI Max uses Text Customisation to dynamically rewrite headlines and descriptions based on user intent and your landing page data. so it's already doing that personalisation work for you. If you layer DKI on top of that, you're forcing a rigid, literal script into a system that Google's AI is trying to optimise intelligently. The two logics conflict with each other, and your ad copy is very likely to suffer for it.

There are three specific problems this creates. First, DKI will literally copy-paste search terms into your headline, including messy, misspelled, or poorly formatted queries that AI Max would otherwise interpret and handle gracefully. Second, if AI Max is selecting dynamic landing pages via Final URL Expansion while DKI is altering the headline to reflect a hyper-specific keyword, you can end up with a jarring mismatch between what the headline promises and where the user lands, driving up bounce rates and driving down conversion rates. Third, you now have two different optimisation logics fighting over the same ad, which undermines performance.

Practically, if you're running AI Max, I'd recommend disabling DKI because they're really not designed to work together.

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How to Use DKI Properly: A Practical Framework

After years of managing accounts across different industries and team structures, here's how I approach DKI with in-house and agency teams:

1. Audit your keyword structure first

DKI is only as good as the keyword list it draws from. Before enabling it, review every keyword in the ad group and ask: if this exact phrase appeared in a headline, would it make sense? If the answer is no for more than a handful of terms, restructure the ad group before proceeding.

2. Write strong default text

Your fallback text should work as a standalone headline, not a placeholder. Treat it as your primary headline and the DKI as an enhancement, not the other way around.

3. Use DKI selectively within a broader ad structure

Don't rely on DKI for every headline. In Responsive Search Ads (RSAs), a common approach is to use DKI in one headline while keeping the others static and brand-controlled. This gives you relevance without sacrificing message consistency.

4. Exclude competitor and branded terms from DKI ad groups

Segment any campaign targeting competitor keywords or your own brand into separate ad groups with manually written copy. Never let DKI run across these.

5. Review regularly

DKI is not set-and-forget. As search behaviour evolves and new queries come through, review what's being inserted and whether it still reflects well on the business. Pull an ad variations report or search terms report periodically and sense-check what users are actually seeing.

6. Test against static alternatives

One of the most valuable things you can do is run a straightforward A/B test: DKI headline versus a carefully written static headline that targets the same theme. In many cases, a well-crafted static headline outperforms DKI, especially for businesses where brand voice and clarity matter more than raw keyword matching.

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The Bottom Line on DKI Google Ads

Dynamic keyword insertion is a tool, not a strategy. Used thoughtfully, in tightly structured ad groups, with strong default copy, in appropriate industries, it can meaningfully improve ad relevance and performance. Used carelessly, across messy keyword lists, in regulated sectors, or anywhere near competitor names, it creates huge risk without much reward.

The best Google Ads practitioners I know use DKI sparingly and deliberately. They understand the mechanics, know where it adds value, and know exactly when to leave it switched off.

If you're managing Google Ads in-house and want to make sure your team is applying features like this correctly and confidently, that's exactly the kind of practical, nuanced knowledge I focus on in my training programmes. There's a big difference between knowing a feature exists and knowing when it's the right call.

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