What is the purpose of the last part of the letter? if you accept this job offer, you hire date will be on the day that you attend new-hire orientation. Plan to

What is the purpose of the last part of the letter?

if you accept this job offer, you hire date will be on the day that you attend new-hire orientation. Plan to work for the remainder of the business day after new-hire orientation ends. Please read the enclosed new-hire package for complete, new-hire instructions and more information about the benefits that Acme offers.