Econometrics models sales and other key metrics like market share and brand awareness based on factors like price, distribution, advertising spend and more. The document discusses building an econometrics model including the needed data, factors for analysis like media activations and promotions, and how the model works. It can then be used to evaluate relationships between variables, forecast sales based on plans, compare ROI of different media, and analyze competitors. Building the initial model takes 1-2 months and then it requires quarterly updates and debugging over a year for ongoing use.