State Bank Of India [SBI] — debit transfer

Address:

New Delhi, Delhi

I need to know why sbi banks has debited rs. 206 from my account that's too without giving any compete knowledge.
Is it because of the minimum balance policy of the bank or what atleast mention why you are doing this.
The message states your a/c xxxxx340503 has a debit by transfer of rs 206.50 on 24/02/18. Avl bal rs 2, 594.14. Download yono @ www.yonosbi.com
Please we have right to know.