CAC (Customer Acquisition Cost)
The total cost of acquiring one new customer, calculated as total sales and marketing spend divided by new customers in the same period. CAC must be meaningfully lower than LTV for a business to compound. A healthy LTV:CAC ratio is 3:1 or better — below 1:1 means you're losing money on every customer.
Related: LTV · Payback Period · Unit Economics
Conversion Rate Optimization (CRO)
The systematic practice of improving the percentage of visitors who take a desired action — purchase, signup, demo request. CRO is the highest-leverage growth activity at most stages: doubling your conversion rate doubles your effective ad spend for free.
Core Web Vitals
Google's set of user experience metrics — Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) — that directly influence search rankings. Sites that fail Core Web Vitals are quietly de-prioritized; passing them is now table stakes.
Content Velocity
The pace at which a brand publishes new, indexable content. Higher velocity correlates with faster authority growth — but only when paired with topical depth. Publishing 20 thin articles per week beats publishing 1 deep one for some keyword goals; the reverse is true for cite-worthy authority content.