Why do we need different AWS Accounts ?

HappySK
New Contributor II

I am just going through the AWS Databricks Platform Administration course and I am curious to know about the Cloud Accounts used to setup Databricks

When we are setting up the Databricks, we are using AWS Account but we are not using that account saying we will be using the another account to manage all the data and processing

Could someone please help what Databricks do with the AWS Account from where it is created ?