Account groups determine which fields you can configure on the G/L master record.
The standard SAP require at least two account groups, one for balance sheet accounts and one of the profit and loss accounts.
OBD4 - Define Screen layout per account group (G/L Accounts)
Double click on the line items.
You can define the fields as Suppress, Requried Entry, Optional Entry or Display
After the definition, you can check it with FSP3 - Chart of Accounts display.
SAP Account Group controls the Number ranges of GL A/C.
The status of fields of the master record of GL belongs to company code area.
1.Account group defines the nature of the accounts.
2. Account group defines number range.
3. AG defined the field status.
4. Ag defines whether the customer/vendor is one-time partner or frequent partner.