How to fix: Excessive pinning in Responsive Search Ads

TL;DR

Pinning RSA assets to fixed positions blocks Google's combination engine from testing them against query intent and shrinks the pool of valid auction combinations. The result is lower Ad Strength, narrower auction eligibility, and weaker CTR across the ad group. Strip every pin that is not strictly mandated by brand or legal policy. The only widely acceptable exceptions are the brand name pinned to Headline position 1 and required legal or disclaimer copy pinned to Description position 2. Everything else should rotate freely so Smart Bidding can find the combinations that win clicks and conversions [1].

Why it matters

Responsive Search Ads work by giving Google up to 15 headlines and 4 descriptions, then letting the system assemble combinations dynamically per query. Each combination is scored against the user's search intent, device, time, and location signals before being served. The whole mechanism depends on the algorithm having enough freedom to try different orderings.

A pin removes an asset from that rotation in everything except the slot you pinned it to. Pin one headline to position 1 and Google can still test the other 14 headlines for positions 2 and 3 — that is mild. Pin three different headlines to position 1 and Google must choose only from those three for that slot, no matter how the query looks. Pin headlines to positions 1, 2 and 3 simultaneously and the combination engine is effectively replaced by your manual ordering, which defeats the purpose of an RSA. Google's Ad Strength documentation explicitly flags pinning as a downgrade signal precisely because each pin shrinks the testable surface [1].

The downstream impact compounds. Lower Ad Strength means fewer ad combinations enter the auction, fewer impressions accumulate, expected CTR drops, and Quality Score erodes for the whole ad group. Accounts that move RSAs from "Poor" to "Excellent" see roughly 15% more clicks and conversions on Google's own data — and "excessive pinning" is one of the three main reasons RSAs sit at "Poor" or "Average" in the first place, alongside thin asset variety and weak headline uniqueness. See Ad Strength below Excellent for the broader scoring mechanism and unique headline variety for the asset-diversity dimension specifically.

The temptation to pin is understandable. Performance marketers want predictability — they want to know exactly what the user will see. But the data favours rotation: combinations chosen by Smart Bidding outperform combinations chosen by humans in the vast majority of auctions, because the algorithm has live query-level signal that the human writing the ad does not.

How to fix

1. Open the under-performing RSA. Navigate to the campaign, then the ad group, then Ads and assets → Ads. Click the RSA flagged with the "Pinning" warning in the right-hand recommendations panel. Each headline and description row shows a pin icon — solid means pinned, outlined means unpinned.

2. Audit every pin against the two-exception rule. Only two exceptions justify a pin in 2026:

   • Brand name pinned to Headline position 1 if brand guidelines explicitly require the brand to lead the ad. This is the most common legitimate pin and Google's own guidance accepts it.
   • Required legal, regulatory, or disclaimer text pinned to Description position 2 if compliance demands the disclaimer appear in a specific position. This is common in regulated verticals like finance, pharma, and gambling.

   Every other pin is a candidate for removal — "we always show feature X first" or "this CTA performs best in position 3" are intuitions, not data. Smart Bidding has the data.

3. Release non-mandatory pins. Click the pin icon on each row and select "Show this asset in any unpinned position" from the dropdown. The pin icon switches from solid to outlined and the asset returns to free rotation.

4. Ensure asset variety even within pinned slots. If you legitimately pin the brand name to Headline 1, Google still needs at least three options for that slot to assemble valid combinations. Otherwise the rest of the RSA cannot rotate. Add two more brand-flavoured headlines pinned to the same position 1 (variations like "Brand", "Brand — Official Site", "Brand for Teams") so the engine has choices.

5. Verify Ad Strength recomputes. Save the ad and refresh the Ads view. Ad Strength typically recalculates within minutes. The pinning warning should disappear from the recommendations panel and the score should climb one tier. Target "Good" minimum, "Excellent" ideal.

6. Monitor combinations and impressions over 2-4 weeks. Open the asset details view (click the ad, then "View asset details") to see which headlines and descriptions are accumulating impressions. Combinations should diversify as Smart Bidding re-explores the asset pool. CTR should follow.

Common mistakes

• Pinning every headline because "we know what works". This converts the RSA into an Expanded Text Ad with extra slots — you lose the combinatorial advantage entirely and Ad Strength collapses to "Poor".

• Pinning a single asset per slot. Pinning one headline to position 1 with no other options for that slot means Google cannot serve the ad if that single headline is disapproved or under-performing. Always pin at least three options per pinned slot.

• Treating "best performing position" as a pin reason. Performance marketers sometimes notice a headline does well in position 1 and pin it there. The performance signal is real but the conclusion is wrong — Smart Bidding already prefers the headline for that position, and pinning blocks it from being tested in other positions where it might also win.

• Forgetting that pinning interacts with Smart Bidding learning. Heavy pinning during Smart Bidding learning phase starves the algorithm of the variation it needs to calibrate bids. New campaigns should start unpinned (except the brand exception) and add pins only if a specific compliance need surfaces.

• Pinning for A/B testing. Pinning is not a test framework. To compare two creative angles, use ad variations or RSA experiments, not pins.

FAQ

Can I leave the brand name unpinned in Headline 1?
Yes, and many advertisers do. Google's combination engine will usually surface the brand name in position 1 for brand-intent queries without a pin, because brand relevance is one of the strongest signals it has. Pin only if brand guidelines explicitly require it.

Does pinning hurt my Quality Score?
Indirectly, yes. Heavy pinning lowers Ad Strength, which lowers expected CTR, which feeds into Quality Score. The connection is not 1-to-1 but the directional effect is consistent.

My legal team requires the disclaimer to appear in every served impression. What do I do?
Pin the disclaimer to Description position 2 and supply at least three disclaimer variations pinned to the same slot. Google requires variety even within pinned positions, so a single pinned disclaimer will not serve reliably.

How many pins is "too many"?
There is no fixed number, but the Ad Strength algorithm penalises pinning aggressively above 2-3 pinned slots. As a working rule, treat any RSA with more than two pins as a candidate for clean-up.

Will removing pins drop performance in the short term?
Performance may dip for 7-14 days while Smart Bidding re-learns the new combination space. The dip is usually small and the recovery typically lands above the previous baseline once Ad Strength climbs.

Sources

[1] Google Ads Help — About Responsive Search Ads (Ad Strength and pinning): https://support.google.com/google-ads/answer/7684791