What is 7-day retention vs 30-day retention?

7-day retention and 30-day retention are user retention metrics that show what percentage of users return to the product after 7 and 30 days from their first use, respectively.

For example, if out of 100 new users, 40 are active after 7 days, then the 7-day retention is 40%. The same applies for 30 days. These metrics help evaluate user engagement and loyalty over time.