How long before I see results?

First separate the steps: an approved file must be uploaded and successfully processed before its changes can affect Amazon delivery. A negative can stop eligible future traffic once applied; it does not recover money already spent or guarantee net savings.

Bid changes need a mature attribution window and sufficient new evidence before you judge their effect. Thin-data accounts may take longer, and price, stock, seasonality or other account changes can confound the comparison.

There is no universal six-week or eight-week deadline for TACOS or organic sales effects. A lower TACOS alone does not prove ads caused organic growth. Use the ACOS and TACOS guide to choose what to measure and keep delivery, efficiency and business outcomes distinct.