What Is Target ROAS?
Target ROAS is a Smart Bidding strategy that shifts the focus from cost per conversion to the total value of conversions generated relative to what you spend. Instead of saying "keep each lead under R300", you say "for every rand I spend, I want to generate R5 in revenue". The algorithm then adjusts bids in real time to chase that return ratio rather than a specific conversion count or cost.
ROAS itself is calculated by dividing conversion value by ad spend and expressing it as a ratio or percentage. If you spend R10,000 on ads and generate R40,000 in tracked revenue, your ROAS is 4:1 or 400%. Target ROAS tells Google what ratio you want to maintain, and the bidding engine tries to honour that by bidding aggressively on auctions that are likely to produce high-value conversions and conservatively on lower-value ones.
Target ROAS is most powerful in e-commerce environments where products carry different prices. A Johannesburg outdoor retailer selling tents priced at R800 and sleeping bags at R250 benefits from ROAS bidding because the algorithm can focus on auctions that are more likely to result in high-value cart totals. A flat CPA target would treat a R250 purchase the same as an R800 one, which is inefficient.
The strategy requires conversion value data to function. This means you must have revenue or value figures attached to your conversion actions in Google Ads. For e-commerce, this is usually handled by dynamic conversion value tracking that captures actual purchase amounts. For service businesses that assign fixed values to leads, the numbers need to be set deliberately and realistically. Without reliable conversion values, the algorithm optimises towards meaningless figures and the results will be poor.
Target ROAS In Practice
A Stellenbosch wine farm running a direct-to-consumer online shop used Target ROAS for their Google Shopping campaigns. Their average basket value varied between R350 for a single bottle and R1,800 for a case. At a Target ROAS of 500%, the algorithm learned to bid more competitively on queries that historically led to case purchases from wine club members in Cape Town and Johannesburg, while reducing bids on terms that typically led to single-bottle impulse purchases. The result was a 28% improvement in revenue per rand of ad spend within eight weeks of switching from manual bidding.
South African retailers running Black Friday or end-of-financial-year promotions should be cautious about Target ROAS during seasonal spikes. The algorithm may have learned from quieter months and underperform when conversion rates surge. A common best practice is to expand the target slightly during promotions, giving the algorithm more room to bid and capture the increased demand, then tighten it again after the period ends.
How Target ROAS bidding works
Target ROAS is an automated Google Ads bidding strategy where you set the return on ad spend you want, and the system adjusts bids to maximise conversion value at that target. If you set a target of 400%, it aims to generate four rand of revenue for every rand spent, bidding higher on searches predicted to produce valuable conversions and lower on those unlikely to. It relies on conversion value tracking, not just conversion counts, so it suits ecommerce and any business that can attach a rand value to conversions. Because it learns from data, it needs enough conversion history to work well; set on too little data, or with an unrealistic target, it can restrict volume sharply.
When to use Target ROAS
Target ROAS suits campaigns where conversions carry different values and you can measure them, most obviously online retail where order sizes vary. It is a good fit once a campaign has accumulated reliable conversion-value data for the system to learn from, and when the business genuinely cares about revenue efficiency rather than raw conversion volume. It is a poor fit for lead generation where every conversion is valued the same, for which target CPA is usually better, and for new campaigns without enough history, which should gather data on a simpler strategy first. Set the target from your real break-even ROAS, and avoid setting it so high that the system starves the campaign of traffic.
FAQ
How is Target ROAS expressed in Google Ads?
Target ROAS is entered as a percentage in Google Ads. A 400% Target ROAS means you want to generate R4 in conversion value for every R1 spent on ads. To calculate your starting target, divide your historical total conversion value by your historical ad spend and multiply by 100. Use your actual performance as the baseline, not a wish figure.
Can I use Target ROAS for lead generation campaigns?
Target ROAS is most effective when conversion values differ between actions, such as products with different prices in an online store. For standard lead generation where every lead has the same value, Target CPA is usually more appropriate. However, if you assign different values to different lead types (hot lead vs cold enquiry), Target ROAS can work for lead gen too.
What data does Target ROAS need to work?
Conversion value tracking and enough recent conversion history for the system to learn from, since it optimises towards revenue, not just conversion counts. Set on too little data, it cannot predict reliably; a common guideline is to build up a steady flow of value-tracked conversions first.
What is the difference between Target ROAS and Maximise Conversion Value?
Both optimise for revenue, but Maximise Conversion Value spends the full budget chasing the most value without a return target, while Target ROAS aims for a specific return on spend. Use Maximise Conversion Value to grow volume within a budget, and Target ROAS to hold a defined efficiency.