MoM - Amazon Glossary

Month over Month (MoM) is a key performance tracking method on Amazon and in e-commerce generally. It shows how a specific metric — such as sales, traffic, conversion rate, or ad spend - has changed from one month to the next.

Common MoM metrics:

• Sales revenue
• Units sold
• Advertising performance (ACoS, CTR, spend)
• Buy Box win rate
• Returns or refund rates

MoM growth formula:Why MoM is important:

• Tracks short-term performance trends
• Helps evaluate the impact of promotions, seasonality, or changes in strategy
• Used in dashboards, business reviews, and seller/vendor reports
• Enables quick detection of positive momentum or operational issues

💡 Example: A seller’s MoM sales increased by 18% in July compared to June due to a Prime Day campaign and improved listing optimization.

In short:
MoM (Month over Month) compares performance metrics between two consecutive months — a valuable tool for tracking short-term trends and making timely business decisions on Amazon.