Amazon share of voice: how to defend your branded search

Somebody types your brand name into Amazon. They already want you. And the first thing they see is a competitor's Sponsored Brands banner, with a cheaper product and a 4.6-star average, sitting above your own listing. That shopper was the cheapest sale you were ever going to make, and you are now paying to win it back, or losing it outright. Your Amazon share of voice on your own brand name is the share of that top-of-page real estate you actually hold, and it is worth checking before you assume it is fine.

Timeline: Amazon announced Reserve share of voice at unBoxed 2025 and launched it on October 23, 2025. This guide reflects how it works as of November 2026.

Amazon has added several tools for this. One, Sponsored Brands reserve share of voice, takes the auction out of the picture for a fixed price. The others are quieter and cheaper. Here is how they fit together, and when a reservation makes sense for a brand your size.

What is Amazon share of voice on branded search?

Share of voice is the percentage of visibility you own for a search term, compared with everyone else on that page. Amazon reports the piece that matters most here as top-of-search impression share: of all the times your ad could have appeared in the top slot for a keyword, how often it did. If your branded Sponsored Brands campaign shows 60% top-of-search impression share, roughly four in ten shoppers searching your name saw someone else's banner first.

Nothing in the standard auction stops another brand from bidding on your name, the same way you can bid on theirs. A branded campaign is an auction you have to keep winning, and competitors set the price.

How Sponsored Brands reserve share of voice works

Amazon Ads launched Sponsored Brands reserve share of voice on October 23, 2025. It lets you secure top-of-search Sponsored Brands placements for your branded keywords at a fixed, upfront price, instead of bidding for them in the auction. Per Amazon's current guide, the terms are:

• Eligibility: enrollment in Amazon Brand Registry, and a Sponsored Brands ad (logo and headline, collection, Store spotlight or video).

• Keywords: exact-match branded terms only, with a minimum of five. Generic terms, competitor names and other non-brand phrases are rejected.

• Minimum spend: $6,000 per campaign in the US marketplace.

• Duration: reservations run from 14 to 90 days.

• Pricing: a fixed cost per thousand impressions (CPM), quoted when you build the reservation, rather than cost per click.

• Where: set up in the Amazon Ads console (Amazon's guide routes it through Ads Agent) or through the Amazon Ads API. Amazon lists it as available in 20 marketplaces, including the US, Canada, the UK, Germany and Japan. Read Amazon's guide in full before you price one.

The headline result Amazon cites from its beta: advertisers' top-of-search impression share on reserved keywords went from 62.7% to 99.3%. That is Amazon's own pilot number, but it shows what the product is built for: near-total coverage of the top slot. It does not promise sales you would not have gotten anyway.

One detail changes the math for smaller brands. The $6,000 minimum is per campaign, and the window can be as short as 14 days. A full 90-day reservation works out to about $2,000 a month. A 14-day reservation around Prime Day or Black Friday still carries the same $6,000 floor, so it is a much more concentrated bet.

Is reserving share of voice worth it versus a branded campaign?

For most brands under about $50K a month in sales, the answer is not yet. Here is the arithmetic we run, using a hypothetical brand.

Say a brand spends $700 a month on a branded Sponsored Brands campaign and holds about 65% top-of-search impression share on its five core brand terms. A 90-day reservation on those terms costs the $6,000 minimum, or $2,000 a month. That is $1,300 a month more than it spends today.

If contribution margin after Amazon fees and cost of goods is 30%, the brand needs roughly $4,300 a month in sales it was previously losing to competitors on its own name ($1,300 divided by 0.30) just to break even. Is the uncovered 35% of your branded traffic really costing you that much? At $15K a month in total sales, almost certainly not. At $200K a month, with heavy branded search and a competitor parked on your name, it might be.

A reservation tends to earn its price when branded volume is large, when one competitor keeps winning your top slot and your branded CPCs keep climbing to fight it, or when a launch or peak window makes two weeks of lost coverage more expensive than the minimum. It also buys predictability: a known brand-defense cost lets the rest of the budget flex.

A well-run branded campaign is the better choice when your branded volume is modest, your top-of-search impression share is already above 80%, or the $6,000 commitment would crowd out non-branded campaigns that actually find new customers. If you are still sorting out which ad type does which job, our breakdown of Sponsored Brands vs Sponsored Products is the place to start.

How do you stop competitors bidding on your brand name on Amazon?

You mostly cannot stop them. You can make it expensive and unrewarding. A practical branded defense stack, in the order we would build it:

1. Own your brand terms in Sponsored Products and Sponsored Brands. Exact-match campaigns on your brand name and its common misspellings, with a placement bid adjustment for top of search. Sponsored Products lets you adjust bids separately for top of search, rest of search and product pages, by up to 900%.

2. Defend your own detail pages. Competitors target your ASINs with product targeting ads. Running Sponsored Products on your own ASINs fills those slots with your cross-sells instead.

3. Use audience bid adjustments on the shoppers who already know you. Covered below.

4. Fix the page they land on. A branded shopper who hits a thin listing can still bounce to the competitor banner.

5. Consider a reservation only once the first four are in place and the arithmetic above still shows a gap worth paying for.

If you believe a competitor's ad crosses into trademark misuse, talk to your trademark counsel and use Brand Registry's reporting tools rather than assuming the ad itself is a violation.

Audience bid adjustments for Sponsored Products

On April 30, 2025, Amazon added three Amazon-built audiences you can raise bids for in Sponsored Products campaigns:

• Purchased brand's product: shoppers who have bought from your brand before.

• Clicked or added brand's product to cart: shoppers who engaged with your products but have not converted.

• High likelihood of purchase based on recent shopping activity: shoppers Amazon judges ready to buy, based on recent clicks and purchases.

Amazon later extended the first two to Sponsored Brands (announced August 26, 2025), alongside a new-to-brand shoppers audience.

For brand defense, the first two matter most. These shoppers already know you, and a competitor's banner is trying to pull them away. Raising bids only for them puts weight where the loss would hurt without inflating cost on everyone else. Amazon reports a median 77% ROAS lift, in-audience versus out, across 1,700 campaigns that boosted the high-likelihood audience. That is Amazon's figure. Test it on your own account.

Sponsored Brands campaigns also let you adjust bids for placements below top of search. On a branded campaign, that lets you pull spend from slots where your ad does little defensive work and concentrate it on the top one.

Brand Tailored Promotions for cart abandoners and repeat buyers

Ads defend the search page. Brand Tailored Promotions work on shoppers who have already shown interest. Brand owners can offer a discount between 10% and 50% that only a chosen audience sees, on the detail page, in your Brand Store and in search results. Audiences include Cart remarketing, Views remarketing, One-time customers, Lapsed customers and Recent customers.

A shopper who added your trail stove to their cart and left is exactly who a competitor's banner will catch on their next search. A targeted 15% offer to Cart remarketing gives them a reason to come back to you.

Since July 2024, catalog-wide promotions also support ASIN exclusion. You can exclude up to 100 parent ASINs (which removes all their child ASINs) or individual child ASINs. That matters for margin: run a catalog-wide retention offer and keep your thinnest-margin products, or anything already on a deal, out of it. You cannot exclude ASINs from a promotion that is already running or scheduled, so build the list before you submit.