Dynamic Search Ads vs Responsive Search Ads: AI Max Tracking Risks

Dynamic Search Ads vs Responsive Search Ads: AI Max Tracking Risks

Dynamic Search Ads earn their place when you need keywordless scale and want to catch the long-tail queries your keyword list misses. Responsive Search Ads earn their place when messaging control matters and you’re running a keyword-led campaign. Running both in separate campaigns with clean negatives and tight URL controls can help cover different search needs. One thing to do today: check your DSA settings, because Google is folding DSA behaviour into AI Max.

TL;DR:

• RSAs can use up to 15 headlines and 4 descriptions; pin only legally required or offer copy, since each pin limits combinations Google can test.
• For DSA, restrict eligible URLs, exclude branded terms and queries already covered by RSAs, and review search terms weekly to catch irrelevant traffic.
• Eligible DSA campaigns begin automatic upgrades in September, with another phase starting in February 2027; audit URL templates before Final URL expansion affects tracking.
• Test URL rules and tracking templates with low spend experiments, and reconcile conversions against CRM revenue before raising campaign budgets.

Table of Contents

• What are Dynamic Search Ads (DSA)?
• Benefits of Dynamic Search Ads
• Limitations and risks of Dynamic Search Ads
• What are Responsive Search Ads (RSA)?
• Benefits of Responsive Search Ads
• Limitations of Responsive Search Ads
• Direct comparison: how DSAs and RSAs differ in targeting, creative and control
• When to use DSAs, when to use RSAs, and how to run them together safely
• Google’s AI Max migration and implications for DSA/RSA strategy
• Practical setup and optimisation checklist (steerability, negatives, tracking)
• Agency perspective from Jesse: how we approach DSA and RSA
• Get your account ready for DSA, RSA and AI Max
• FAQ
• Sources

What are Dynamic Search Ads (DSA)?

A Dynamic Search Ad skips keywords entirely. Google reads your website content and matches it to what people are searching, then auto-generates a headline and picks a landing page to match the query. You’re not writing ad copy for every product or service page, Google is building it from what’s already live on your site.

Targeting runs through domain targeting, page feeds or URL rules based on categories, which means the structure of your site largely decides what gets matched. An online retailer with a large catalogue can use DSA to cover long-tail product searches it would never have the time to build keyword lists for, such as a specific boot size and width that was never added as a keyword.

Benefits of Dynamic Search Ads

The appeal of DSA is operational: it removes a lot of manual work while picking up traffic you’d otherwise miss.

• Cuts the time spent mapping keywords and writing ad copy, since headlines and landing pages pull straight from live site content.
• Fills gaps in keyword coverage by catching long-tail and unexpected search queries your exact and phrase match lists don’t reach.
• Scales with minimal upkeep across large inventories or offers that change often, which suits retailers and service businesses with constantly shifting stock or availability.

For businesses running large catalogues, this is the main reason DSA earns a spot in the account at all. It’s less useful when you only have a handful of pages to work with.

Limitations and risks of Dynamic Search Ads

The flexibility that makes DSA useful is also where it causes problems. You’re handing Google control of the headline and the landing page, and without firm guardrails that control gets loose fast.

• You lose a lot of say over the exact wording of ads and which page a click lands on, unless URL inclusions, exclusions and negatives are set tightly.
• DSAs will surface irrelevant queries without a strong negative keyword list, so they need regular search term reviews, not a set-and-forget approach.
• Final URL expansion and automated URL selection can break tracking or send traffic to broken pages if your tracking templates aren’t built to handle dynamic URLs.

Pro Tip: Start new DSA campaigns on a small budget, and check every landing page Google selects against your tracking setup before increasing spend.

What are Responsive Search Ads (RSA)?

A Responsive Search Ad is built from assets rather than a single fixed ad. You supply up to 15 headlines and 4 descriptions, and Google assembles and tests combinations to find what performs best for each search.

The Ad Strength and asset performance reports show which headlines and descriptions are carrying the ad and which combinations are actually serving, giving you a clear signal on what to improve.

You can pin a headline or description to a fixed position, which guarantees it appears but limits how many combinations Google can test. Pinning protects a legal line or a specific offer, but every pin you add narrows the system’s room to learn, so it’s worth using sparingly rather than as a default.

Benefits of Responsive Search Ads

RSAs give you back the control that DSAs trade away, which matters most in campaigns built around specific keyword intent.

• Better control over messaging, with the ability to align copy to keyword intent and pin a line where it’s genuinely essential.
• Pairs well with Smart Bidding, letting the system optimise toward conversions while your assets keep the message on brief.
• Improving Ad Strength from “Poor” to “Excellent” is linked to an average 12% lift in conversions in Google’s own internal data, which makes asset quality worth the ongoing attention.

This is why RSAs can sit at the centre of keyword-led acquisition campaigns, letting you stay specific about what you’re saying while still letting the algorithm test combinations.

Limitations of Responsive Search Ads

RSAs reward effort. Put in a thin set of near-identical headlines and you’ll get thin results, because the system has nothing meaningful to test.

Google needs a genuine spread of unique, high-quality headlines and descriptions to learn from, not near-identical variations on the same sentence. Over-pinning causes the opposite problem: lock too many assets into fixed positions and you stop the system finding better combinations it might otherwise have found. And RSAs aren’t a write-once format. Ad Strength drifts as assets go stale or competitors shift their own messaging, so keeping it high takes ongoing review rather than a single setup session.

Direct comparison: how DSAs and RSAs differ in targeting, creative and control

The two formats solve different problems, and the differences show up clearly once you line them up.

• Targeting basis: DSA matches queries using your website content and URL rules; RSA matches using the keywords you choose and the relevance of your assets.
• Creative generation: DSA builds headlines and picks landing pages automatically from page content; RSA serves combinations from the headlines and descriptions you write, including any you pin.
• Control: DSA gives you structural control through inclusions, exclusions and negatives; RSA gives you message-level control through asset choice and pinning.
• Scale and maintenance: DSA scales fast across large or changing inventories but needs constant negative keyword upkeep; RSA scales through testing but needs regular asset refreshes to stay sharp.

Neither format is strictly better. DSA buys you reach you didn’t know to ask for. RSA buys you precision over what gets said once someone’s searching for exactly what you offer.

When to use DSAs, when to use RSAs, and how to run them together safely

Pick based on the job, not habit. Use DSAs when you’re covering gap traffic, running a large or fast-moving product catalogue, or launching something new before you’ve built out a keyword list. Use RSAs for core acquisition campaigns where keyword intent is known and the wording of the ad genuinely affects conversion, things like service businesses competing on trust and specificity.

Running both without a plan usually means they start bidding against each other on the same queries, which wastes budget on internal competition instead of new customers.

1. Audit tracking first: confirm conversions are reconciled to CRM revenue before you turn anything on, so you’re scaling against real sales, not platform numbers.
2. Set a strong negative keyword list on DSA campaigns, including every term already covered by an RSA campaign, and exclude branded terms from acquisition DSA entirely.
3. Give campaigns a clear priority so Google knows which one should serve first when both could technically match a query.
4. Limit DSA targeting to the specific pages or categories worth matching against, not your whole domain.
5. Test every change, URL rule, pinned asset or negative addition, in a low-budget experiment before rolling it out account-wide.

Google’s AI Max migration and implications for DSA/RSA strategy

Google has confirmed Dynamic Search Ads are upgrading to AI Max, with auto-upgrades for eligible campaigns beginning in September and a further auto-upgrade phase starting in February 2027. If you’re running DSA today, this isn’t optional background reading, it’s a change to how your account will behave.

AI Max for Search combines search term matching, text customisation and final URL expansion into one feature set, and Google reports typical uplift in conversions or conversion value compared with legacy setups, alongside more steering controls than DSA offered on its own.

The practical move is to get ahead of the auto-upgrade rather than let it happen to you. Audit your URL and tracking templates now, because Final URL expansion can break tracking that isn’t built for dynamic URLs. Use the new steering controls to lock in brand exclusions and URL guards before the migration touches a live campaign, not after.

Practical setup and optimisation checklist (steerability, negatives, tracking)

Before you touch spend, fix the plumbing. A campaign that looks efficient on the platform dashboard can still be bleeding budget if conversions aren’t tied to what actually closes as revenue.

1. Fix conversion tracking first, then test tracking templates and final URL expansion in a sandbox campaign on a small budget before applying them to anything spending real money.
2. Set URL inclusions and exclusions, plus brand and location controls, so automated matching stays inside the boundaries you’ve set.
3. Pin assets only where the wording is non-negotiable, a legal disclaimer or a specific promo price, and leave the rest open for testing.
4. Favour exact and phrase match with tight negatives over broad match, and schedule search term reviews weekly rather than hoping the algorithm self-corrects.
5. Reconcile every conversion against CRM revenue before scaling budget, and make sure each lead is counted once, not once per platform.

Pro Tip: If a lead shows up in both your Google Ads and Meta Ads conversion reports, decide upfront which platform gets credit in your CRM, otherwise your blended ROAS will look better than your bank balance.

Retailers running large catalogues through Shopping and Performance Max should apply the same tracking discipline before layering DSA or AI Max on top, since the risk of double-counted conversions multiplies with more campaign types live at once.

Agency perspective from Jesse: how we approach DSA and RSA

We fix tracking before we touch a DSA or AI Max setting, because reach you can’t measure accurately isn’t reach you can trust. Once tracking is solid, we favour exact and phrase match with tight negatives, pin only the assets that genuinely need pinning, and run search term reviews on a fixed schedule rather than waiting for something to go wrong.

If you want to know whether your account is actually ready for this, start with our $99 AUD Google Ads audit.

— Jesse Lees

Get your account ready for DSA, RSA and AI Max

Running DSA and RSA well comes down to tracking you can trust and a match type strategy that doesn’t waste budget on queries you never wanted to pay for. Our Google Ads audit checks whether your conversions are reconciling to real CRM revenue, where spend is leaking on irrelevant DSA queries, and whether your account is ready for the AI Max migration before Google makes that decision for you. Current prices are on our audit page.

We’ll tell you upfront if we think your account needs work before it needs more spend, no 12-month lock-in, no guesswork about where your budget is going. Start with the $99 AUD Google Ads audit and get a clear picture of what’s working and what isn’t.

FAQ

What are Dynamic Search Ads?

Dynamic Search Ads are a Google Ads format that matches search queries to your website content instead of a keyword list, then automatically generates a headline and selects a landing page. They’re built to cover large or frequently changing inventories without manual keyword mapping for every page.

What are Responsive Search Ads?

Responsive Search Ads let you supply up to 15 headlines and 4 descriptions, and Google tests combinations to find what performs best for each search. You keep control over the wording while the system handles which combination shows.

Can you give an example of a Dynamic Search Ad in use?

A retailer with a large catalogue can run DSA to catch specific long-tail searches, like a particular boot size and width, that were never added as keywords. The ad headline and landing page are generated automatically from the matching product page.

What’s a benefit of Responsive Search Ads?

Responsive Search Ads give you more control over messaging than Dynamic Search Ads while still letting Google test combinations for relevance. Improving Ad Strength from “Poor” to “Excellent” is linked to an average 12% lift in conversions in Google’s own data.

Should I run DSA and RSA campaigns together?

Yes, most accounts benefit from running both, with DSA covering keyword gaps and RSA handling core acquisition where messaging matters. They need clear negative keywords and campaign priority settings so they aren’t bidding against each other on the same searches.

Recommended

• Fix Tracking First, Then Tools: Click Fraud Protection for Agencies
• Fix Google Ads Conversion Tracking
• Why Your Google Ads Reporting Is Probably Lying to You
• Stop Wasting Ad Spend: Google Ads Conversion Tracking for Agencies