Dynamic Search Ads: How They Work, When to Use Them and the Move to AI Max

Dynamic Search Ads were launched to answer a simple problem: no advertiser can list every search that matches a catalogue of thousands of pages. Google's help page About Dynamic Search Ads describes them as ideal for advertisers with a well-developed website or a large inventory. This guide covers how they work, how to set them up properly, how they compare with keyword campaigns and AI Max, and why the quality of your pages decides their results.

How do Dynamic Search Ads work?

A DSA campaign starts from your site, not from keywords. When a search happens, Google compares it with the content of your pages and, if one is relevant, builds an ad on the fly:

• Headline: generated automatically from the search and from your page. Google states that the most important signal for the headline is the HTML title tag of the page.
• Landing page: chosen by Google among the pages you target, the one most relevant to the search.
• Description: the only text you write, so it carries your offer, proof and call to action.

DSA ads enter the same auction as your other ads and are ranked the same way, with your bid, ad quality and context. When a search matches a keyword from another campaign of the same account, the keyword ad is usually preferred, which lets DSA act as a catch-all for searches your keywords miss.

Which targets and exclusions can you use?

Targeting tells Google which pages can generate ads. The options, from the broadest to the most controlled:

Exclusions matter as much as targets. In its guide to creating targets for Dynamic Search Ads, Google recommends excluding pages that contain phrases like "sold out" or "unavailable". Exclude also pages that do not sell: careers, blog posts, login, legal pages, support. Negative keywords still apply to DSA campaigns even though they have no keywords: use them to keep out job searches, free-version searches and your brand if a separate brand campaign covers it.

When should you use Dynamic Search Ads?

DSA works when three conditions are met: a large number of pages, clear page titles and content, and a catalogue that does not change every day. Google itself advises against DSA for sites that change rapidly (daily deals), sites built mostly in images and sites that require a login to see content.

• Good fit: e-commerce sites with thousands of product pages, travel sites, classified sites, B2B catalogues, multi-service companies.
• Poor fit: one-page sites, very short pages, sites where titles are generic ("Home", "Product 1"), regulated sectors where every ad text must be validated.

DSA is also a research tool. Its search terms report shows queries you would never have bought, which feed your keyword campaigns, your negative lists and your content plan. Microsoft Advertising offers an equivalent format, also named Dynamic Search Ads.

How do you set up a DSA campaign that performs?

1. Start with a page feed

A feed of your best converting URLs, with custom labels such as "high margin" or "bestseller", gives you control from day one. Widen to categories or all pages once the data is clean.

2. Write descriptions per target

One generic description for a whole site wastes the only text you control. Write one per ad group: for the product category, the delivery promise or the service area.

3. Use automated bidding

Google recommends automated bidding for DSA, because traffic varies widely across targets. Track conversions properly before you start, or bidding will optimise on noise.

4. Review search terms every week

The DSA search terms report shows each query, the headline generated and the landing page used. Exclude irrelevant queries, and move the best ones into keyword campaigns with their own ads.

5. Fix the pages, not only the ads

A weak headline usually comes from a weak title tag, and a bad landing page choice from unclear content. Improving the page improves the ad.

Before launch, measure the economics with the ROAS calculator, and check the expected cost per click in our Google Ads cost guide.

What changes with the upgrade to AI Max?

Google announced on 15 April 2026 that Dynamic Search Ads would be upgraded to AI Max for Search, then extended the timeline on 11 June 2026. According to the official Google Ads announcement, the sunset and automatic upgrade of DSA begin in February 2027, while campaigns using automatically created assets or the campaign-level broad match setting are upgraded from September 2026 (checked October 2026). Google recommends upgrading voluntarily before the deadline, with dedicated upgrade tools.

AI Max is a set of three features applied to a standard Search campaign: search term matching (reaching relevant searches beyond your keywords), text customization (headlines and descriptions generated from your site and assets) and final URL expansion (sending the click to the most relevant page). Google states that upgraded DSA campaigns keep their settings, data and URL controls, with the three features turned on.

The AI Max FAQ confirms that negative keywords stay respected when AI Max is on. Google reports, from its internal data, an average of 7% more conversions or conversion value at a similar CPA or ROAS when advertisers use the full AI Max feature set rather than search term matching alone: a vendor figure, to validate with an experiment in your own account. A Google Ads audit before migrating tells you which DSA ad groups bring profit and which only add volume.

To prepare the migration without losing control:

1. Export your DSA data: targets, page feeds, exclusions, search terms with conversions, over at least 90 days.
2. Turn the winning queries into keywords in standard ad groups, with their own responsive search ads.
3. Rebuild your exclusions as URL exclusions and negative keywords in the AI Max campaign.
4. Run an experiment with Google Ads experiments, on part of the traffic, before switching the whole campaign.

Why does your website decide DSA and AI Max results?

DSA and AI Max read your site to choose searches, write headlines and pick landing pages. The same elements that help a page rank in organic search help it perform in these campaigns:

• Precise title tags: they become the headlines. Check them page by page with the free Sorank Chrome extension.
• Crawlable, indexable pages: content hidden behind a login or in images cannot be used.
• Clear topic per page: one page, one intent. A well-built landing page converts the click that the ad earns.
• Depth of content: a site that covers more questions offers more relevant pages for more searches.

This is where paid and organic search meet. A good page earns a better ad today, ranks on Google over time and can be cited when people ask ChatGPT, Gemini or Perplexity. Sorank, our product, finds keywords automatically and publishes optimized articles that widen this base of pages with its blog article generator, and it shows whether AI assistants cite your brand with AI mention tracking. To compare what clicks cost with what organic traffic saves, use the SEO vs paid savings calculator.

Key takeaways

Dynamic Search Ads turn your website into your keyword list, and AI Max now carries that logic forward: target with page feeds, exclude what does not sell, write strong descriptions, review search terms weekly and plan your migration before February 2027. For the rest of the account, read our Google Ads guide, the basics of paid search and how to raise your Quality Score. Then strengthen the pages these campaigns depend on with Sorank, from $49 per month with a 3-day free trial.