Amazon PPC glossary
Budget
A budget is the amount you allow a campaign to spend each day. When it runs out, your ads stop showing until the next day.
Example
You set a $20 daily budget. If your ads get $20 worth of clicks by 2 p.m., they stop for the rest of the day, and you may miss afternoon and evening shoppers.
Where it matters most: Book 1, The Amazon PPC Clarity Guide, in the chapter “Scaling Strategies.”
Go deeper
The glossary gives you the one-line answer. The Amazon PPC Clarity Guide explains why it matters and what to do about it.

