What is the purpose of Technician Groups in the Associate Groups to Template section of templates?

What is the purpose of Technician Groups in the Associate Groups to Template section of templates?

Does anyone know what it does when you put a Technician Group in the "Associate Groups to Template" section of a Request Template?   I thought maybe it would limit which technicians would see the template when they are creating new incidents but that does not appear to be the case. 

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