You will get an offer if you would like to sign up for 12 or 24 billable cycles, you will get two offers. One will offer you 25% discount and the other will offer you $25, deducted from the amount indicated in the invoice. By doing just a simple calculation, you can be able to determine which helps you save more money is it the 25% or the $25 discount offers? Whatever HostGator coupon code saves more money, use it and get more value for your money.
As you decide what discount is best for you, you may also want to know about other services and hosting packages offered. The more that you know about the other packages, the easier it will be for you to decide whether to upgrade, like, say, move from shared server to VPS. With time and with the expected growth of your online business, you can move to dedicated server where you will have all the resources to yourself, to manage and to use as you want in all privacy and with no downtimes.