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Xavier Fok

Digital marketer and data analyst with 15+ years in advertising, content, and growth. Founder of DataResearchTools, based in Singapore. I write about AI tools, automation, and productivity for solopreneurs building real businesses without a team.

Customer Segmentation Explained: Grouping Users Without Overcomplicating It

September 11, 2026July 24, 2026 by Xavier Fok

Customer segmentation groups your users into a few useful buckets so you treat each the right way. Here’s how to do it without slicing your list too thin.

Categories General

Gross Margin for a One-Person SaaS: the Number That Sets Your Ceiling

September 11, 2026July 24, 2026 by Xavier Fok

Gross margin is the revenue you keep after delivery costs. Here’s what it means for a one-person SaaS and why it sets your ceiling on spending.

Categories General

Churn Rate Explained: How to Measure It and Actually Reduce It

July 15, 2026 by Xavier Fok

Churn rate is the share of customers or revenue you lose each period. Here’s how to measure it honestly and the levers that actually reduce it.

Categories General

What is data quality?

May 17, 2026 by Xavier Fok

What is data quality?. A plain-English explainer with examples, misconceptions, and when this concept actually matters.

Categories Data Skills

What is statistical significance for business decisions

May 16, 2026 by Xavier Fok

What is statistical significance for business decisions. A plain-English explainer with examples, misconceptions, and when this concept actually matters.

Categories Research Methodology

OKR vs KPI: what is the difference and when to use each

May 16, 2026 by Xavier Fok

OKR vs KPI: what is the difference and when to use each. A plain-English explainer with examples, misconceptions, and when this concept actually matters.

Categories Growth

What is a north star metric?

May 16, 2026 by Xavier Fok

What is a north star metric?. A plain-English explainer with examples, misconceptions, and when this concept actually matters.

Categories Growth

What is product-led growth?

May 16, 2026 by Xavier Fok

What is product-led growth?. A plain-English explainer with examples, misconceptions, and when this concept actually matters.

Categories Growth

What is conversion rate optimization?

May 16, 2026 by Xavier Fok

What is conversion rate optimization?. A plain-English explainer with examples, misconceptions, and when this concept actually matters.

Categories Growth

What is bounce rate in 2026 (and why it changed)

May 16, 2026 by Xavier Fok

What is bounce rate in 2026 (and why it changed). A plain-English explainer with examples, misconceptions, and when this concept actually matters.

Categories Growth
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