What are BINs used for?

[Odinn89]

I am sorry for my extremely nooby question as I am very new to all this stuff. I have no clue what to do with BINs could someone please help me understand

 

[Odinn89]

If you would like to text me rather than reply here

 

[grey_a]

its first 6 digits

 

[Mr_ MiX]

BIN= bank identification number, it just tells you what bank card is issued from