About the unique user definition and user retention rate logic in the Google Analytics SDK
We analyze using data collected from Google Analytics SDK.
Please tell me the definition of the analysis result below.
1. What is the definition of a unique user measured by Google Analytics SDK?
2. What is the ID used by Google Analytics SDK to determine the unique user's uniqueness?
3. What is the aggregation logic of the user retention rate of the cohort analysis?
I am waiting for the answer, so thank you.