Custom Options Plus is the easiest way to add your custom variables as a Settings Page for your Theme.
It's very useful for beginners or who doesn't want to create a settings page as a plugin.
If you are not a expertise in PHP, just follow the instructions following the FAQ tab.
You can for example, register the address and phone numbers of your company to leave in the header of your site. So, if someday relocate, you do not need to change your theme. Just change administratively.
Also, you can use to enter a social network login, as twitter, facebook, Youtube, Instagram, and more.
This Plugin was Based on Custom Settings (Custom Configs) which has been removal from WordPress Repository.
Support on GitHub, please!