Which ESS programs can be used for creating external transactions?

We are using the "Create Bank Statement Transactions" ESS job to create external transactions from bank statement lines using predefined rules.
While searching for the ESS program, we found several jobs with similar names but could not locate Oracle documentation detailing the purpose of each.
Could someone please explain the function of each job?

Name: Import External Transactions - Description: Import External Cash Transactions
Name: Create External Cash Transactions - Description: Creates external cash transactions in Cash Management
Name: Create Bank Statement Transactions - Description: Creates external cash transactions from bank statement lines and reconciles them together