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Money and efficiency

ROAS

Return on Ad Spend

Ad sales divided by ad spend — the inverse of ACOS. A 4× ROAS is a 25% ACOS.

By AutoPPC Inc.

Same information as ACOS, pointed the other way. ROAS goes up when things improve; ACOS goes down. Amazon's console leans on ACOS, most other advertising platforms lean on ROAS.

AutoPPC uses ACOS throughout for consistency with Seller Central, and because break-even is easier to reason about as a percentage of price.