ROAS vs ROI
Understand why return on ad spend and return on investment answer different business questions.
Start with the formula
ROAS is attributed revenue divided by ad spend. ROI is broader because it can incorporate costs beyond media spend. The mathematics is easy; deciding which revenue and costs belong in the calculation is the real analytical work.
Revenue needs a definition
Gross order value, net revenue, subscription value, expected lifetime value, closed-won pipeline, and cash collected are not interchangeable. Choose the revenue definition that matches the decision and keep it consistent.
Attribution changes the numerator
If two tools give different channels credit for the same order, their channel-level ROAS can differ even though total business revenue is unchanged. That makes model, window, and identity rules part of every ROAS interpretation.
Use guardrails
Track refunds, cancellations, repeat purchases, new-customer status, margin, and lag when those materially affect the business. A high ROAS number can be misleading when it rewards low-margin repeat demand or ignores sales that close weeks later.
Decision rule
Use ROAS for media efficiency questions and broader ROI or contribution metrics for business economics. Do not force one metric to answer every question.
For teams that have outgrown native reporting, the next practical step is to compare independent tracking platforms against the measurement gaps you have actually documented—not against an abstract feature checklist.