It basically works like this: if you intend to conduct eCommerce on your website, accepting credit cards and selling goods or services, then you need the Business plan. If you don't need eCommerce functionality, but do intend to host more than one domain, then the Baby plan should be perfect for you. If your intention is to host a single domain without eCommerce, then the Hatchling plan should meet your needs. It's really just those 3 factors that determine the best plan for you.