Cost per click (CPC)

Divide what you spent by the number of clicks. Spend $50 for 100 clicks and your CPC is $0.50. On Google search ads, CPC depends on the keyword and how many others bid on it. On Meta, it depends on your CPM and how often people click.

A cheap click is only good if it turns into a customer. Look at cost per signup or sale, and at ROAS for a store. Test many ad creatives, because a better click-through rate often lowers CPC. Decide how much to spend on adssoon before you start.