Most ad accounts don't have a budget problem, they have a structure problem. Spend more on a messy account and you just lose money faster.
Mixing keywords you know convert with ones you're testing makes every number meaningless. Split campaigns so winners scale and experiments stay contained. Clarity is what makes ads controllable.
Your search term report is the most honest document in your account. Harvest the terms that convert into their own tight campaigns, and add the wasteful ones as negatives. Do this weekly, not quarterly.
There's no universal "good" ACoS. It depends on your margin and whether a sale is a first purchase or a repeat customer worth far more over time. Set targets from your economics, not a benchmark you read somewhere.
Once you rank organically for your core term, ads should defend that position and then push into adjacent terms. Scaling ads before the listing converts is pouring water into a leaky bucket.
Profitable advertising is structure plus discipline: isolate winners, cut waste weekly, and set targets from your real margins.
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