All Articles & Tutorials
Explore practical guides, step-by-step masterclasses, and foundational definitions across AI, SQL, and data systems — written in plain, human English.
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When maps and location data actually help your analysis
Geospatial analysis helps when location changes the decision, not when a map would merely look executive. Learn good-fit use cases, weak-fit traps, and a project card before you…
What are ARR and MRR? Recurring revenue explained for non-finance people
ARR and MRR sound simple until three teams report three different growth numbers. Learn the non-finance vocabulary, what each metric includes, and how to ask definition questions without…
How to build a customer funnel that matches how your product delivers value
Generic marketing funnels hide the step that actually matters in your product. Part 1 of Customer analytics basics maps Visit to Pay stages to real events so activation…
How to design A/B tests that lead to good decisions, beyond the p-value
p < 0.05 is not a product strategy. Experiment design beyond the p-value covers hypotheses, ethics, rollouts, and decisions that survive contact with real teams. Part 1 of…
Sampling and bias for analysts
Your sample is not “the data.” It is a story about who showed up, who got filtered out, and what bias you baked into the chart. Part 1…
