A $40 phone case and a $900 laptop should not both count as one conversion. That is the entire case for value-based bidding, and it’s why Google, Meta, TikTok and Microsoft Advertising have all built automated bid strategies around predicted value rather than conversion count.
What value-based bidding actually does
Value-based bidding is a family of automated bid strategies that sets a price for each ad auction according to the expected revenue, profit or other value that conversion will bring. Google describes it as a subset of Smart Bidding that optimizes for conversion value, not conversion volume. Meta, TikTok and Microsoft Advertising run equivalents.
At auction time the system predicts two things: the probability of a conversion and the value that conversion is likely to carry. Multiply them and you get the expected value. Divide that by your target ROAS and you have the bid.
Take a click with a 2% predicted conversion rate and a $150 predicted basket. Expected value is $3. At a 500% target ROAS, the implied bid is 60 cents. If the same click predicts a $600 basket, the bid jumps to $2.40. Target CPA would have bid the same on both.
Google currently offers two flavours: Maximize conversion value spends the budget for as much value as possible, while Target ROAS chases maximum value at a set efficiency ratio. In June 2026 Google relabelled the latter back to standalone Target ROAS after five years as an optional target inside Maximize conversion value.
Where the value comes from
The bid is only as good as the value signal you feed the platform. Transaction values are passed in the conversion tag or pixel at the moment of purchase. Google requires at least two unique values before value bidding makes sense, either dynamic values on one goal or static values spread across goals.
Lead businesses rarely know revenue at the moment of a form fill. Google’s guidance suggests lead scores, values tied to form answers, profit margins or predicted lifetime value. Ads product manager Carlo Buchmann put it this way in a March 2026 Ads Decoded episode: choose the lowest conversion action that has volume and is a high-quality indicator of value.
Google’s October 22, 2026 update made new-customer value multipliers generally available, allowing uplifts from 1.1x to 5x. At 1.2x, a $100 first purchase counts as $120. But inflated values draw complaints: Andrew Lolk of Savvy Revenue has argued for a lower ROAS target on new customers instead of added value, and Branden Antolick stopped using a Google test tool that inflated the conversion value column.
Thresholds, rules and the profit gap
Value bidding needs more data because it learns two predictions. The practical thresholds to know:
- Google Target ROAS: at least 15 conversions in 30 days, conversion delays under 7 days, and 3 weeks to 1–2 cycles of value uploads before switching.
- Demand Gen: 50 valued conversions in 35 days at campaign level, including 10 in the last 7, plus 100 account-wide, with no changes for 14 days after launch.
- Evaluation: judge Target ROAS over at least 50 conversions with meaningful, varied values, against 30 for Target CPA.
Margin is the glaring gap. A revenue-based target treats a $30 thin-margin product as more valuable than a $20 fat-margin product. Google’s cost of goods sold profit optimisation and Meta’s profit-based ROAS test are both aimed at that problem.
There’s also a governance issue. Google Ads product manager Kristina Park says many businesses care about conversion value but struggle to pass it back into Google Ads. Her biggest named pitfall: values that don’t reflect business goals, so a campaign hits its ROAS while the business doesn’t.
What to do about it
Start with the expected value framework before you touch a setting: predicted conversion rate × predicted order value = expected value; expected value ÷ target ROAS = your implied bid. If that bid doesn’t clear your margin, change the target or fix the value signal.
Then respect thresholds, pass profit or LTV when revenue alone misleads, and use the original conversion value column Google added in November 2025 to see what rules and adjustments are doing to your real numbers.
Source: PPC Land
