Support E-Mail Address - What's it for?

Support E-Mail Address - What's it for?

Hey,
 
  So, i'm just setting up SD+MSP and am importing the accounts but can't seem to get my head around the Support E-Mail Address field.  I see that it needs to be unique and i see the note that is there:
 
Specify the ’To’ address to which e-mail requests will be sent by a requester from this account. Any replies sent to requesters from this account are also sent using this e-mail address.
 
Can someone rework how this e-mail address is used?
 
thanks,
dean

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