The Website URL is the URL of your website where you will be using the Geo Content service.
For example, if you need to show geo content in http://mywebsite.com then the website URL will be http://mywebsite.com
Use your domain name if you plan to use the geo content service in your entire website or use a particular page URL if you plan to only use it in that page or its all its sub pages.
For example if you need to show geo content in http://mywebsite.com/blog and/or all its sub pages, then the Website URL should be http://mywebsite.com/blog