Addresses are what omg.lol is all about. Your address is your identity, your chunk of real estate in the omg.lol namespace. You’ll see them sometimes referred to with the prefix, like foobar, but they can also be represented as subdomains (foobar.omg.lol) and email addresses (email@example.com).
Addresses appear on your Dashboard, but you can selectively hide them from there if you wish. Your dashboard also includes a link to your Addresses page, which lists all of your addresses in one place and provides important information about each of them.