Churn rate
Churn rate, also known as the rate of attrition or customer churn, is a metric that measures the rate at which customers stop doing business with an entity within a specific period. This can be applied to various scenarios:
CAC – cost acquisition client
Customer Acquisition Cost (CAC) is a key business metric that measures the average cost a company incurs to acquire a new customer. It includes all costs associated with sales and marketing efforts, such as advertising expenses, salaries, commissions, bonuses,
CPV – cost per view
A bid method for video campaigns where you pay per view. A view counts when a viewer watches 30 seconds of your video ad (or the duration if it’s shorter than 30 seconds) or interacts with the ad, whichever comes first.
CPC (cost per click)
Cost per click (CPC) is an online advertising model where advertisers pay a publisher (such as a website owner or search engine) each time their ad is clicked. It’s a common way to pay for online ads and is often used in pay-per-click (PPC) advertising campaigns.
Event Google Analytics (GA)
Google Analytics events are designed to track user interactions with any elements of the site regardless of page views or screens.
Regular expressions in Google Analytic
Regular expressions (RegExp) is a tool for searching text strings and checking them against a pattern, character or word. The result of a regular expression is a subset of data selected according to the logic inherent in the expression.
Google Analytics debugging tools
In case Google Analytics is not working correctly, it is advisable to debug the system to detect and eliminate errors
Debugging mode in Google Tag Manager
Preview mode allows you to verify the correctness of Google Tag Manager tag settings before publishing a container, to identify current problems during the testing phase and to reduce the risk of their occurrence in the future. Preview mode in GTM is also called debug mode.
GTM triggers
A trigger in GTM is a condition that activates or blocks a tag. There must be at least one trigger to start a tag.
Customer Profile (Портрет клиента)

Портрет клиента, или Customer Profile — это образ реального покупателя, для которого ваш продукт является решением проблемы.