Help with a Facebook page!!?

[Teddybear]

I made a new Facebook page, and I have one like!! How do I get more likes?!?! and it says each page can have a username what does that mean?!?! this is what it says Each Page can have a username
Easily direct someone to your Page by setting a username for it. After you set your username, you may only change it once. help!!

[Ghof]

example page username https://www.facebook.com/smadav
to get more likes, invite your friends to like your page