What Is Target ROAS?

How Target ROAS Works

Target ROAS (tROAS) is a Smart Bidding strategy within Google Ads that uses machine learning to set bids at auction time, optimizing toward a target return on ad spend expressed as a percentage. If you spend $1,000 and generate $5,000 in conversion value, your ROAS is 500%. Setting a 500% tROAS instructs Google to set bids that achieve approximately that ratio across your campaign. Google raises bids for auctions predicted to yield high value and lowers them for lower-value opportunities.

Why Target ROAS Matters for B2B Marketing

tROAS is ideal for e-commerce accounts with tracked revenue values, lead gen campaigns where leads are assigned dollar values, and Shopping campaigns with varying product margins. It outperforms manual CPC and Maximize Clicks in accounts with sufficient conversion history. Google recommends a minimum of 15-20 conversions per month within the campaign's lookback window, typically 30 days, before switching to tROAS. In accounts below this threshold, the algorithm lacks data to bid accurately.

Target ROAS: Best Practices & Strategic Application

Best practices for tROAS include setting your initial target 10-20% above your current observed ROAS to give the algorithm headroom. Avoid making large target changes (more than 15-20% at once) as this triggers a learning period and can cause spend volatility. Use portfolio bid strategies when managing multiple campaigns with shared ROAS goals. Monitor the Auction Insights report and impression share alongside ROAS to ensure the strategy isn't being too conservative.

Agency Perspective: Target ROAS in Practice

At MV3, we transition clients from manual CPC to tROAS in a structured three-phase approach: build conversion volume with Maximize Conversions, establish a ROAS baseline, then set tROAS at observed ROAS minus 10% to maintain volume while signaling value optimization. This prevents the "freeze" effect where a too-high tROAS target causes the algorithm to throttle spending so aggressively that the campaign stalls.