IT asset management/Data contolling for IT assets

IT asset management/Data contolling for IT assets

Good day sir, 

I would like to ask what are the responsiblities and work for a IT asset/data controller for IT assets because sir my manager just told me that soon i will be handling the our company's IT assest we will implement barcode system for all IT asset of our company. Would please kindly help me or just a brief discussion of what should i do i already have the list of all of our company's asset but the problem is it not fully updated because my manager only assign me in our main building but we have many branches almost all over in saudi arabia 

Thank you so much 
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