When you create a Facebook page for the first time the Facebook page URL will look like,
https://www.facebook.com/yourpagename-4567891
The above URL is hard to remember for your page audience. If it is like the following URL it will be easy to remember,
https://www.facebook.com/yourpagename
Previously the profile name and page names can be edited using the following URL,
https://www.facebook.com/username
Now the above link is used to change the profile username only.
For changing the username of the page you must be an admin.
To get a short and desired URL read on the following steps.
Steps to Create a Custom URL
1. Go to your Facebook page.
2. On Left side of the page there will be hyperlink.
3. Click the Create Page @Username hyperlink.
4. Now Create Page Username dialog box will open.
5. Enter Username.Pick the best one for your business.
6. Click Username button.
7. If the username is available it will be created for you. Sometimes it might take time to get a user name. A new page may not be immediately be able to get a username. Read the Choosing a username help tips to pick the right handle for four URL.
The final page URL will now look like https://www.facebook.com/yourpagename.