Total addressable market is the total revenue opportunity available if a product captured 100% of its relevant market.

Land and expand is a sales strategy of winning a small initial deal inside an organization, then growing usage and revenue across teams over time.

The viral coefficient (K-factor) is the average number of new users each existing user generates; a value above 1 means self-sustaining viral growth.

A business flywheel is a self-reinforcing loop where each part of the model feeds the next, so momentum compounds and growth becomes increasingly efficient.

Sales-led growth relies on a sales team to drive revenue through outbound prospecting, demos and negotiated deals, typical of higher-priced B2B products.

Product-led growth is a go-to-market approach where the product itself drives acquisition, conversion and expansion, often via free trials or freemium.

Feature creep is the gradual accumulation of features beyond a product’s core purpose, adding complexity and cost while diluting usability.

A/B testing compares two versions of a page, feature or message against each other with live users to see which performs better on a chosen metric.

Actionable metrics tie observed results to specific, repeatable actions, so a team can make decisions — unlike vanity metrics that merely look good.

Innovation accounting is a way to measure startup progress through learning and leading indicators when traditional financial metrics are not yet meaningful.