Estimation question

How would you estimate Google AdSense revenue?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Tests structured estimation of an ad-network revenue figure using publisher traffic, ad impressions, and CPM assumptions.

State the goal: estimate Google AdSense's annual revenue, the network serving ads on third-party publisher sites.
Estimate the ad-supported web audience: assume roughly 2 billion unique monthly visitors across AdSense-participating publisher sites globally.
Estimate ad impressions per visitor: assume an average of 20 ad impressions per visitor per month across pageviews.
Estimate average CPM: assume a blended global CPM of $2, accounting for wide variance by region and ad format.
Compute: 2 billion visitors times 20 impressions divided by 1000 times $2, about $80 billion in gross ad spend flowing through the network annually.
Apply AdSense's revenue share: Google typically keeps roughly a third as its own revenue, about $25 billion, then sanity-check against disclosed figures.

Builds from a clear formula, visitors times impressions times CPM, then applies the actual revenue-share split, rather than guessing directly.
States each assumption explicitly, audience size, impressions per visitor, CPM, so the logic is auditable and challengeable.
Correctly distinguishes gross ad spend from Google's actual take, the revenue share, a detail many candidates miss.
Sanity-checks against Google's own disclosed network revenue line to validate the order of magnitude.

Computing only gross ad spend and presenting it as Google's revenue, ignoring the publisher revenue share.
Using one flat CPM assumption with no acknowledgment of the wide real-world variance by region and format.

Chapters of the AI PM course that teach what this question tests.