Gaurav Bhasin

Data Science

How to evaluate regression models beyond simple R-Squared (RMSE, MAE, MAPE)?

To comprehensively evaluate regression models beyond R-squared, employ metrics like RMSE for penalizing large errors, MAE for robust average error, and MAPE for scale-independent percentage error, considering their distinct sensitivities and applications.

Digital Advertising

What is Conversion API (CAPI) and why is first-party server-side tracking mandatory post-cookie loss?

Conversion API (CAPI) enables direct server-to-server data transfer to ad platforms, and first-party server-side tracking is mandatory post-cookie loss for accurate attribution and ROAS due to browser restrictions and ad blockers.

Digital Marketing

What is Product-Led Growth (PLG) and how does it alter traditional digital marketing strategies?

PLG makes the product the core driver of acquisition, activation, and growth, replacing heavy ad spend with data‑driven in‑product tactics.

Machine Learning

What are the main differences between supervised, unsupervised, and reinforcement learning paradigms?

Supervised uses labeled data, unsupervised finds patterns without labels, and RL learns policies via reward feedback.

Machine Learning

How to detect model drift and data drift in production prediction APIs using Evidently AI?

Use Evidently AI monitors to compare live API data against a reference set, flagging drift when statistical scores exceed set thresholds.

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