Site Location : This is a process that organizations use to identify retail locations most suitable to the "constituent customer profiles ".
I can see your problem, Soudabeh, I've spent some time tracking down the meaning I think "constituent" has in this context. I don't know why it took so long.
My take is that the constituent customer profiles here are profiles of the customers who are likely to visit the "retail locations" mentioned earlier. In this sense, "constituent" means
- serving to make up a thing; component: the constituent parts of a motor. - The Free Dictionary
The "constituent customers" are those who make up the "customer base" of retail locations.
(I have to say this is the kind of management speak up with which I will not put)