The less bandwidth you have, the slower it takes your website to load, regardless of your visitor’s connection type. Visitors will have to wait their turn. The less data transfer you have, the more often you will find your website unavailable because you have reached the maximum amount of data allowed to be transferred.
You first need to determine what is sufficient for your website to function. You will need to take into consideration the size of your website and the number of visitors you have in a month’s time. Your goal is to ensure that all these visitors can view your website without any problem.