It's like a phone number for your website.
So if hosting is like renting space for your website to live in, then a web address is definitely the phone number that helps people easily pull-it-up. We are partnered with eNom, one of the largest domain companies in the world, to bring you a wide variety of domain name options.
.com or what?
There are generally no rules regarding what kind of domain name ending (suffix) you can or should get. People are most familiar with ".com" for a commercial business. There are many alternatives such as .cc, .biz, etc. If you are an organization (such as a non-profit) you can get a .org, but you don't have to. It's up to you. Focus more on keeping the domain short, rather than on the suffix. Try to keep it short, sweet and memorable.
How many domains should I get?
Technically you can get as many domains as you'd like; however, you must acquire at least one domain in order for your website to be accessible. Keep in mind that domains must be renewed annually (much like renting a house that you can never own).