Brand Bidding Strategy for EcommerceAlways Cap the CPC

Brand search campaigns should run on Maximize Clicks with a bid cap, on portfolio bidding with target ROAS and a max CPC bid cap, or on Manual CPC. Never on target impression share, and never on target ROAS or target CPA without a cap. Brand traffic already has purchase intent before the ad is clicked, so there's no reliable incremental signal for a smart bidding algorithm to optimize against, and an uncapped strategy gives Google license to charge whatever CPC it wants on your own brand name.

The instinct to put brand on tROAS comes from seeing an inflated ROAS number and assuming it means the algorithm should have more freedom to spend. That's backwards. The inflated number is a measurement artifact, not a sign the campaign is under-optimized, and giving Smart Bidding an uncapped value target to chase on a campaign with no real optimization decision to make just adds volatility.

This post covers what actually happens when brand runs uncapped, the three bid setups that work instead, and how to protect brand impression share without handing the price of your own name to an algorithm. For subscription brands, keeping brand apart from cold prospecting is also how you scale subscription ecom brands on Google Ads.

What Goes Wrong When Brand Runs Uncapped

Uncapped target ROAS or target CPA on brand search lets the algorithm set click prices on traffic that was already yours. It adds bid volatility where none is needed, and the CPC it is willing to pay is bounded only by its own estimate of conversion value, not by what a brand click should cost. Set the target too aggressively and the opposite happens: Smart Bidding cuts bids and loses impression share on a campaign that should almost always win the auction, since the cost of losing a brand click to a competitor is disproportionately high relative to the bid savings.

This is a specific, avoidable failure mode: a brand campaign losing impression share while technically "hitting its target ROAS" in every reporting window, because the target itself was set on a distorted baseline.

Target impression share fails the same test from the other side. It raises bids until the share target is met, whatever the click costs, so CPC inflates unnecessarily on a term where you were already winning the auction.

The Three Bid Setups That Fit Brand Traffic

Maximize Clicks with a bid cap (around $0.20 as a default, higher if the category's baseline CPC is already elevated), portfolio bidding on target ROAS with a max CPC bid cap, or Manual CPC set roughly 20% above the campaign's average CPC. All three keep brand spend predictable by putting the ceiling on click price in your hands, and protect impression share without asking an algorithm to decide what your own name should cost. The goal on brand isn't efficiency optimization. It's capturing essentially all available brand traffic at a cost that doesn't matter much either way, because brand clicks convert at a rate non-brand traffic never will.

Never Run Pure Brand Search Below a 300% Target

If a brand campaign is somehow still being evaluated against a target ROAS framework elsewhere in reporting, anything below 300% should be treated as a red flag worth investigating immediately, not a number to optimize toward. A brand campaign underperforming that badly usually points to a tracking issue, a competitor bidding aggressively on your brand terms, or a landing page problem, not a bidding problem.

Protecting Impression Share Is the Real Brand Metric

Impression share, not ROAS, is the metric to watch on brand campaigns. It is something to monitor, never a bid strategy to run. If a brand campaign is losing impression share while otherwise hitting performance targets, that's an immediate signal to raise the budget or bid cap, because every lost brand impression is a customer who searched your name and saw a competitor first. Shopiator is a Google Ads agency for ecommerce brands, run personally by a 16-year PPC specialist with expertise in DTC, supplement/healthcare compliance, PMax architecture, and incrementality testing, and impression share loss on brand is one of the fastest, cheapest wins available in an account audit because the fix is almost always just a budget or bid cap increase.

Adding Converted Search Terms as Exact Match Brand Keywords

Review search term reports on brand campaigns regularly and add converting brand-adjacent terms as exact match keywords rather than leaving them to broad or phrase match discovery. This tightens control over exactly which queries the brand campaign is capturing and keeps the campaign's cost structure predictable, which matters more on brand than optimizing for marginal efficiency gains.