By using the cohort data exploration template, you can analyze changes in repeat rates for user groups with common attributes. A cohort is a group of users with common attributes. By default, the first contact is set as the group. Starting from the first contact date, it is possible to analyze whether users have made repeat visits or purchases since then.
Reference: [GA4] Cohort Data Exploration - Analytics Help
User Lifetime
User Lifetime is an exploration report that allows you to evaluate the lifetime value (LTV) of a user if you are measuring revenue with GA4. It has the feature that it can evaluate the value including taiyuan mobile phone numbers database not only the behavior in one visit but also the behavior afterwards. You can understand how much profit a single user will give you over their lifetime.
Reference: [GA4] User Lifetime - Analytics Help
Blank
As the name suggests, Blank is a default exploration report with no metrics, dimensions, etc. Once you are familiar with the six exploration reports explained above and the data you need is clear, you will likely use "Blank" more often.