Estimation question

Estimate the number of YouTube users.

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

Estimation using global internet population and platform penetration rate for a globally dominant product.

Start with global internet users, roughly 5.3 billion people worldwide.
Estimate the share using this platform at least monthly, since it is one of the most widely used services globally, around 45 to 50 percent.
Multiply to estimate global monthly active users.
Sanity check against publicly known scale, commonly cited as over 2 billion logged in monthly users.
State the result as a range and note logged in versus total viewership would differ.

Anchors on global internet population, then applies a defensible penetration rate rather than guessing a raw number.
Shows the math, 5.3 billion times 47 percent gives roughly 2.5 billion, close to the publicly reported scale, a good sanity check.
Distinguishes logged in users from total viewership, since the service is also used heavily without an account.

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