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    Posta AI

    What is MER? Marketing efficiency ratio explained

    MER (marketing efficiency ratio) is total store revenue divided by total marketing spend across all channels.

    How is MER calculated?

    MER = total revenue ÷ total marketing spend

    Example

    A store with $250,000 revenue and $50,000 total ad spend in a quarter has a MER of 5.

    Why does MER matter for e-commerce?

    Because MER doesn't depend on platform attribution, it's a useful reality check when each ad platform claims credit for the same sale.

    How does Posta use MER?

    Posta's agents use MER when reviewing your accounts and recommending changes. See the AI marketing analytics page for how it fits into your workflow.

    Related terms

    See the AI marketing analytics