What Is Smart Bidding?
Also written as automated bidding, value-based bidding, Maximize Conversion Value.
Definition
Smart Bidding is Google's automatic bidding. It sets a bid for each auction from the conversion data you send it. For an ecommerce store, this is how Performance Max and Shopping decide what a click is worth. It only works as well as your tracking and the target you give it.
Written by Christopher Krassnig, Founder & CEO of ZenoX Media. Written by the ZenoX team from the accounts we run. Definitions are general; the numbers in examples are maths, not client results.
Smart Bidding, Explained
Google looks at the device, the search, the time, the product, and whether similar clicks have bought before. Then it bids more on the clicks it thinks will sell, and less on the rest. You pick the goal. Maximize conversions chases more sales. Maximize conversion value chases more revenue. Target ROAS (tROAS) adds a floor: only buy clicks that look likely to hit your return.
The mistake is putting a tight target on a new campaign. With no conversion history, Smart Bidding has nothing to learn from. It either spends almost nothing or chases a tiny slice of traffic. Start with no target, let it collect sales, then add a target from your break-even ROAS.
The other mistake is blaming Smart Bidding when tracking is wrong. If half your iPhone sales never reach Google, the algorithm is bidding on a store that looks worse than it is. Fix conversion tracking first. Then set the target from margin, not from a number you wish the dashboard showed.
How We Use It at ZenoX
We start feed-only Performance Max with Maximize Conversion Value and no target. We read break-even ROAS before any bid target goes on. Across 200+ ecom accounts, we do not add tROAS until there is enough purchase data to learn from. We never treat a pretty ROAS as proof if Shopify says otherwise.
Questions People Ask About Smart Bidding
What Is Smart Bidding in Google Ads?
It is Google setting the bid for you at each auction, using the conversion data you send. For a store that means Performance Max and Shopping bid higher on clicks that look likely to buy, and lower on the rest. The strategy is only as good as the sales it can see and the target you set.
Should I Use a Target ROAS on a New Smart Bidding Campaign?
Not on day one. A tight target with zero sales history starves the campaign. It never collects enough data to learn. Start with Maximize Conversion Value and no target. After you have a run of real purchases and you know break-even ROAS (1 divided by your net margin), then add a target.
Related terms
- Target ROASTarget ROAS is a Google Ads bid strategy that tries to get a return you type in, as a percentage of spend.
- Learning PhaseThe learning phase is the stretch after a big change when Smart Bidding is still guessing.
- Conversion TrackingConversion tracking is the setup that tells Google Ads when a click turns into a real sale, and how much that sale is worth.
- Break-Even ROASBreak-even ROAS is the return on ad spend you must hit before a sale makes any profit.
Go deeper
On the call, we look at your account live. If we can grow it, we will show you how. If we cannot, we will tell you that too, and point you at someone who can.
We work with brands serious about scale. If that is you, let's talk.
