T30D

T30D is one of Amazon’s standard timeframes for tracking and comparing business performance.
 Instead of using a calendar month, T30D always represents the rolling last 30 days, updated daily.
This gives sellers and vendors a more accurate and current view of trends.

Where T30D is used:

• Retail sales analysis
• Traffic and glance views
• Advertising metrics (ACOS, ROAS, CPC, impressions)
• Conversion rate tracking
• Inventory metrics (STR, OOS, Buyable %)
• Forecasting and replenishment decisions

Why T30D is useful:

• Removes month to month volatility
• Shows real demand patterns
• Helps normalize promotional spikes
• Reflects the most recent customer behavior
• Supports fast operational decision making

Example:
If today is March 15, the T30D period covers February 14 to March 15.
A vendor might analyze T30D shipped revenue, T30D STR, and T30D conversion rate to evaluate current performance.

Why It Matters:
T30D gives a clear, up to date snapshot of business health, helping sellers and vendors adjust pricing, ads, and inventory based on the most accurate performance data.

In short:
T30D (Trailing 30 Days) is the rolling 30 day period used to measure the most current Amazon performance indicators.