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Super admin can send email or sms by checking in send through check box. Title and description is also mandatory field.
If he wants to send this to several receiver then he can select several receiver in the group section.
If he wants to send this to individual receiver or certain role receiver then he can select role of the receiver and select the name or names in the individual section.
If he wants to send this to particular class students then he can select a class and certain section in the class section.