Escape velocity is a term used to describe the speed and trajectory of a startup's growth. It refers to the rate at which a company can achieve a self-sustaining rate of growth, where its revenue is growing at a rate that exceeds its expenses, and it can continue to grow on its own without relying on external funding.

A "Key Performance Indicator" (KPI) is a metric used to measure the success of a startup's business strategy. KPIs are specific, quantifiable goals used to track progress toward a company's objectives.

Hourly Active Users (HAU) is a metric that measures the number of unique users who have engaged with a startup's product or service within a given hour.

Daily Active Users (DAU) is a metric used to track the number of unique individuals who have interacted with a startup's product or service each day.

Monthly Active Users (MAU) is a metric that measures the number of unique users engaged with a startup's product or service in a given month.

Dormant users have signed up for a startup's product or service but are no longer actively using it.

User retention refers to the ability of a startup to keep its users coming back over time and using its product or service.

"Traction" refers to the growth and momentum that a startup is experiencing in terms of its user base, revenue, or other key metrics. It describes the level of adoption and success a startup is achieving in the market.

An "unfair advantage" in a startup refers to a unique advantage that a company has over its competitors.

Hockey stick growth is a term used to describe a sudden and rapid increase in a metric, such as revenue or user base, that resembles the shape of a hockey stick lying flat and then abruptly rising upward.

An accelerator is a program or organization that helps startups to grow and develop by providing resources, mentorship, and support.

Freemium is a business model where a product or service is provided for free, but with certain features or access to additional content that is only available through a paid subscription or premium plan.

A Minimum Viable Product (MVP) is a product or service with the minimum set of features that can be used by early customers to validate a business idea and gather feedback.

Testing at a startup refers to the process of evaluating a product or service under development to ensure that it meets the needs of the target market and functions as intended.

Product-market fit for startups refers to the point at which a startup's product or service meets the needs and wants of its target market.

Customer discovery is the process that startups use to understand their target market and validate the assumptions about their business idea.