Set once here. The promotion shows in every customer's vault; finance options show to customers who can see their quote. Sales months drive the manager dashboard.
Current promotion
After that day it stops showing by itself, so an expired offer can't be left up by mistake.
Finance options
Add each option you can currently offer. They appear together so customers can compare them.
This is a regulated disclosure. Only change it if compliance has asked you to. It is always shown with the options.
Sales months
Sales months rarely match calendar months. Set them here and the manager dashboard offers the current one as a choice.