
ACOS divides your ad spend by the retail sale price Amazon credits to your ads — money you never keep. TACOS divides it by the royalties your ads actually generated. Here is the difference, a worked example, how to read TACOS (100% is break-even), and why it is the only ad metric denominated in money you keep.

Your first Amazon ad campaign, step by step: which campaign type to start with, how to set bids and budgets that can't hurt you, the two-campaign structure that harvests keywords automatically, and — the part every tutorial skips — how to know if it's actually making money.

Break-even ACOS is the exact point where an Amazon ad stops costing you money. Here is the formula, worked examples for ebooks and paperbacks, and why comparing ACOS to your list price is the mistake quietly draining your budget.

Unmanaged Amazon book campaigns waste 30–50% of their budget on clicks that never convert. Here is how to read your search-term report, concrete rules for negative keywords, and why waste should be measured against net profit.

Amazon ads have no minimum spend and no fixed price — you pay per click, at auction. Here is what book clicks typically cost, what a $5, $10 and $20 daily budget realistically buys, how to size a budget from your royalty instead of a round number, and when raising the budget is the wrong move.

An Amazon ad campaign with zero impressions isn't broken — it's losing auctions. Here is the diagnostic ladder, in order: bid, relevance, targeting width, and the 'low search volume' trap, plus what a healthy ramp-up actually looks like so you stop fixing campaigns that just needed 48 hours.