Conversion Rate: the percentage of people who convert from visitors to customers.
Advertising: to pay money to raise awareness
CAC (Customer Acquisition Cost): how much you spend on average to get a visitor to become a customer
MRR (Monthly Recurring Revenue): revenue that is subscription or expected to recur month over month
ARR (Annual Recurring Revenue): revenue that is subscription or expected to recur year over year
Churn: percentage of customer that cancel or stop being customers, typically measured annually
Product-market fit: the degree to which a product satisfies a strong market demand.