Collections are the numbers of data reports including subcategories.
For example, in the report section, there is a collection known as “Life Cycle” with subcategories namely acquisition, engagement, monetization, and retention.
Likewise, there is a collection called “User” with subcategories namely demographics and tech.
These collections are used regularly if you are using GA4.
You can also create your own collections within the report section.
So we hope now you have a better understanding of collections in Google Analytics 4.
Also click to watch video on How to create a new collection in GA4?