LIFETIME VALUE (LTV)
Это совокупная прибыль компании, получаемая от одного клиента за все время сотрудничества с ним. Есть также упрощенный вариант русского определения, который кратко характеризует этот показатель, — пожизненная стоимость клиента.

Lifetime Value (or Customer lifetime) . Customer lifetime value is the metric that indicates the total revenue a business can reasonably expect from a single customer account. It considers a customer’s revenue value, and compares that number to the company’s predicted customer lifespan.
Let’s assume the following:

Profit generated by the customer each year = $1,000
Number of years that they are a customer of the brand = 5 years
Cost to acquire the customer = $2,000

The customer lifetime value of this customer would be:

$1,000 (annual profit from the customer) X 5 (number of years that they are a customer) less $2,000 (acquisition cost) = $3,000 = LTV.

That is, $1,000 X 5 – $2,000 = $3,000.