This notice is addressed to tenant asking him/her to vacate the premises due to some reason or if landlord does not wish to extend the period of the existing agreement.
It is needed in case you as landlord wishes to get your property vacated for any reason. This notice serves as records for future legal actions if required.
This notice send by any lawyer duly signed on his/her letterhead makes it legally binding.
You as a landlord may use it if you want to get the premises of the rented property vacated.