Hi Sruti,
Verification profile will check entry for scaning activity.
ex >. Bin name is sruti and it verification barcode is 0001 then when you enable verification. user has to scan barcode which you made for bin sruti. that is 0001 barcode. So when you made verification active system will check bin name with verification filed matching.
Now validation.
for validation to if you want 4 char for in place of 8 and validate the data is correct. like sccc code validation.
Regards
Suraj