Pick a North Star and Guardrail Metrics for YouTube TV's Live TV Subscription Service

YouTube TV is Google's monthly subscription for watching live broadcast and cable channels over the internet instead of through a cable or satellite box. Suppose you are the product manager responsible for it. How would you judge whether the service is succeeding? Lay out the metrics you would track, choose the one you would treat as the main measure of success, and explain what you would watch alongside it to catch progress that comes at a hidden cost. ```hint Decide who has to win More than one party depends on this service: the household paying every month, the networks whose channels it carries, the advertisers buying time inside those channels, and Google itself. Work out what success looks like for each before you settle on a single number. ``` ### Clarifying Questions - Should I treat the service as mature, so that keeping paying households matters as much as adding new ones, or as still early, where reaching new subscribers comes first? - Is success judged mainly on subscriber growth and retention, on how much people watch, or on profitability after the fees paid to channel owners? - Does the scope include add-on packages and the advertising sold inside live programming, or only the base subscription? - One subscription is shared by several people in a home. Should the household or the individual viewer be the unit we measure? ### What a Strong Answer Covers - What the service delivers to paying households, channel partners, advertisers and Google, and a clearly stated goal for the business - Metrics along the subscriber journey from sign-up to renewal, each defined precisely (unit, time window, threshold) - One primary success metric, justified against alternatives such as subscriber count or total watch time - Guardrails that catch harmful ways of moving that metric, covering streaming quality, cost and the wider YouTube ecosystem - How seasonality, tenure cohorts and viewer segments change the way the numbers are read ### Follow-up Questions - Your main metric climbs every autumn and falls every spring. How do you separate real progress from the sports calendar? - A carriage dispute takes a major network's channels off the service for a while. Which metrics move first, and how would you size the damage? - Leadership wants to raise the monthly price. How would you use your metric set to judge the change afterward?