Programming & DSA

Time complexity and Big O notation for beginners

Big O notation for beginners: the classes from O(1) to O(2^n) with examples, how to read code, amortised cost, space complexity and the limits of Big O.

Programming & DSA

Binary search explained with code in Python, C++ and JavaScript

Binary search explained with tested Python, C++ and JavaScript code: 20 steps for 1,000,000 items, the safe midpoint, lower bound and search on the answer.

Programming & DSA

Sorting algorithms explained: bubble, merge and quick sort

Sorting algorithms explained with a worked pass on 5 elements, best, average and worst time, space and stability, and what Python and Java use.

Data Analytics

MongoDB vs MySQL: differences, use cases and how to choose

MongoDB vs MySQL compared on data model, schema, joins, transactions and scaling, with 3 orders modelled both ways and a decision guide by use case.

Data Analytics

What is ETL? Data pipelines explained for beginners

What is ETL? Extract, transform, load explained with a 5-row pipeline run in Python, ETL vs ELT, batch vs streaming and the tools in the category.

Data Analytics

Data analyst roadmap for 2027: skills, tools and projects in order

Data analyst roadmap for 2027 in seven stages: Excel and statistics, SQL, BI, Python, storytelling, domain and portfolio, each with a project and a proof.

Data Analytics

A/B testing explained: how analysts and product teams run experiments

A/B testing explained for analysts: the six steps, a sample size of 3,839 visitors per variant for a 10% to 12% lift, p-values, and the peeking trap.

Data Analytics

Data cleaning techniques in Excel, SQL and Python

Data cleaning techniques in Excel, SQL and Python: a seven-step order, one messy 6-row table cleaned two ways, and when not to delete values or outliers.

Data Analytics

SQL window functions explained: ROW_NUMBER, RANK, LAG, running totals

SQL window functions explained with result tables: ROW_NUMBER, RANK and DENSE_RANK on a 45-unit tie, LAG, LEAD, running totals and the default frame trap.

Data Analytics

SQL joins explained with examples: inner, left, right and full

SQL joins explained with examples: inner, left, right and full joins return 3, 4, 4 and 5 rows on two small tables, plus a MySQL FULL JOIN substitute.

Digital Marketing

CAC, LTV, ROAS and CTR: marketing metrics explained with formulas

Marketing metrics explained: formulas for CTR, ROAS, CAC and LTV, a worked rupee example, and why one business can show an LTV to CAC of 3.2 or 12.0.

Digital Marketing

Social media marketing in 2027: strategy, channels and metrics

Social media marketing strategy for 2027: how to pick channels with India data, which metrics each platform defines, and how to measure results.

Digital Marketing

Google Analytics 4 for marketers: key reports, events and metrics

Google Analytics 4 for beginners: how events, sessions and key events work, what engagement rate means and which report groups marketers read first.

Digital Marketing

Content marketing strategy: a step-by-step plan for 2027

A content marketing strategy in 7 steps: goal, audience, topics, formats, distribution, calendar and measurement, plus a table linking goals to metrics.

Digital Marketing

Best SEO tools for 2027: top 10 free and paid options

The 10 best SEO tools for 2027 by job, from free Google reports to paid suites, with what each does, one concrete use and the limit that matters.

Digital Marketing

AEO vs GEO vs SEO: how to get found in AI search in 2027

AEO vs SEO explained: Google's 15 May 2026 guide says optimizing for AI Overviews and AI Mode is still SEO. What is documented and what is unproven.

Product Management

Product discovery process: customer interviews and validation

Product discovery process in 7 tests: run customer interviews, map assumptions and test ideas cheaply before building, with a hypothetical worked example.

Product Management

User stories examples: format, INVEST and acceptance criteria

User stories examples with INVEST and Given-When-Then acceptance criteria: the format, a hypothetical table of 3 stories, splitting and common mistakes.

Product Management

North star metric and AARRR: product metrics for PMs

North star metric explained with the AARRR funnel: Amplitude's 3 qualities of a good metric, input metrics, a hypothetical funnel table and pitfalls.

Product Management

Product manager interview questions with answer frameworks for 2027

Product manager interview questions across 6 types, with an answer framework and a hypothetical model answer for each, as sourced on 7 November 2026.

Product Management

Product prioritization frameworks: RICE, MoSCoW, Kano, ICE

Product prioritization frameworks compared: how 4 methods (RICE, MoSCoW, Kano, ICE) work, a hypothetical RICE table with scores, and when each one fits.

Product Management

Product roadmap examples: types and how to build one

Product roadmap examples for 4 types (timeline, now-next-later, outcome-based, theme-based), a hypothetical table and the steps to build one.

Product Management

How to write a PRD: product requirements template and example

How to write a PRD using 8 sections from Atlassian's template, with a hypothetical worked example, the PRD vs BRD difference and AI feature additions.

Artificial Intelligence

Best no-code and low-code AI app builders in 2027

Ten no-code and low-code AI app builders for founders in 2027, from Lovable to n8n, with what each can ship and the security, ownership and scaling limits.

Artificial Intelligence

Top 10 AI tools for data analysts in 2027 and what to verify

Ten AI tools for data analysts to know going into 2027, across spreadsheets, SQL, notebooks and BI, with what each does and the check an analyst owns.