Do you recall we talked about the fact that we have to be careful while choosing metrics for the A/B test? Let's try to add one metric to check if the result differs. 
For example, we may try to find if the result changes if we use only users that have been to the site earlier.

A/B test is one of the critical decisions when implementing something new in the IT sphere. It is the right time to get acquainted with this test!

In this section, we will learn some preparation things that are held before the A/B test.

In this section, we will perform our first A/B test. An easy version of the A/B test will help us to practice without difficulties!

It is time to meet the real A/B test. In this section, we will train ourselves using the knowledge we received during the two previous sections. After studying this section, you can say: 'I know what the A/B test is!'.

Upd Metric

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