Cheap clicks can be expensive customers

A low cost per click can hide the fact that the wrong people are reaching your store.

Imagine two keyword themes for a fictional backpack store. One attracts people looking for a sewing pattern; the other attracts people comparing a compact weekend bag. The first may generate cheaper clicks. If the store sells finished bags, those clicks still solve the wrong problem.

Read the need behind the query

Start by asking what a person would expect after clicking. A comparison search needs useful evidence about alternatives. A dimensions search needs measurements. A purchase search needs the actual product, current price and delivery information. Match the destination to that expectation.

For an irrelevant query, record why it is irrelevant and which negative-keyword scope makes sense. A store that sells no repair service might exclude a specific repair query. A business that also sells replacement parts needs a more careful decision. Broad exclusions can remove useful demand along with waste.

Check the denominator

In an illustrative campaign, $180 buys 120 clicks and six purchases. Purchase CPA is $30. If only four buyers are new customers, media CAC is $45. Those numbers describe different outcomes. A report that calls both cost per acquisition without defining acquisition can create the wrong decision.

Look at net revenue, variable costs and returns for the relevant orders. Cheap traffic is useful only when it contributes to the outcome you are trying to buy. A higher CPC can be acceptable when the traffic has a better purchase rate and healthy contribution.

Avoid judging a query too early

No purchases from a small number of relevant clicks does not automatically mean a keyword is bad. Check conversion lag and the product page, then use the loss ceiling and review window you set before launch. Irrelevant intent is a reason to act promptly; a small sample is a reason to be precise about uncertainty.

Try this today

Take your highest-spend query themes and add four columns: expected need, matching page, new customers and contribution. Mark each keep, investigate or exclude with a reason. The keyword guide includes a campaign map and an exclusion log you can reuse.