The numbers a campaign is judged on, calculated the way the platforms calculate them: CTR, CPC, CPM, ROAS, budgets and UTM links.
Cost per click, and the break-even click: what a click is worth at your conversion rate and margin, which is the number that says whether your CPC is cheap.
CPC $1.42 · worth $2.34 · headroom $0.92Arithmetic →Solve CPM, cost or impressions from the other two, and add reach to see the frequency and what reaching one person really cost.
CPM $7.20 · frequency 6.41 · $0.0462 a personArithmetic →CTR with its confidence range, and the impressions it would take to tell your rate apart from another one, because small rates are noisier than they look.
0.507% · range 0.471% to 0.545% · needs 447KArithmetic →One journey through five attribution models side by side, so the swing between last-click and first-click is visible before anybody picks a favourite.
Same conversion, five answersArithmetic →Bounce rate under both definitions, the Universal Analytics one and the GA4 engagement one, from the same sessions, with the gap between them.
Two definitions, same sessionsArithmetic →The two-proportion z-test, plus the parts that decide whether it means anything: sample size needed, the interval on the lift, and what peeking costs.
z 2.103 · p 0.0355 · needs 888 a sideArithmetic →The budget a revenue target needs, with the interval on the conversion rate it rests on and what happens when the cost per click rises as you scale.
The interval is 61% of the answerArithmetic →Generate valid, ready-to-paste WordPress code in seconds without configuring a local runtime.
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