Product analyst - google - screening question

I am not so sure to answer one of the screening questions I got from a recruiter. I am mostly a Bi person ie. building sql data models, talking to end-users, and creating data visualization. I attempted to build an ML model with sales data but it doesn't perform well.

(4) What would you consider to be your quantitative expertise and interest? (i.e. data mining, machine learning, time series analysis, experiment design, operations research etc.)

I am studying to learn …

analyst datascience google product