Tools 
[How to Set Up GA4] Is It Easy to Set Up If You're Already Using UA?
Ryutaro 2021.12.27 Tools 
A Beginner-Friendly Guide to Setting Up GA4, Complete with Screenshots!
Ryutaro 2021.11.26 Tools 
Were GA4 and UA Completely Different Tools? An Easy-to-Understand Explanation of the Differences Between the Two
Ryutaro 2021.10.28