Year‑over‑Year sales are your “am I actually growing, or just busy?” comparison—this January versus last January, this Q4 against the previous one. It cuts through holiday spikes and Prime Day bumps to show whether your brand is moving in the right direction underneath all the noise. For Amazon sellers, YoY is the number you look at when you want to know if all the launches, tweaks, and ad spend are truly paying off.
- Use YoY whenever you compare the same month, quarter, or full year to the one before to see real underlying change.
- The idea is simple: measure the difference in sales or profit between the two periods and express it as a percentage.
- Check YoY by product and by channel so you can double down on what’s genuinely gaining ground and fix or retire what’s quietly slipping.
