ACOS/ROAS is a cost metric. Market share is a growth metric. Brands obsess over

By Ted Gibson · February 12, 2026 · Curated by George's Blog

ACOS/ROAS is a cost metric. Market share is a growth metric.

Brands obsess over shaving 3 points off ACOS.

Meanwhile a competitor takes the shelf space in customers’ brains.

Sometimes the correct move is spending more to gain share now, so you can spend less later.

Actionable takeaway: Set a “share goal” for your top 10 keywords. Then reverse-engineer the traffic and spend needed to get there.

Don't have bandwidth to run this in-house? Your agency giving you a vacant stare when you bring this up?

Book a call and get control of your 2026 Amazon growth: https://lnkd.in/echTXSQq

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