An SEO-Friendly URL is a web address that is clearly legible to humans. For instance, it might feature the domain name followed by a sequence of words separated by a hyphen or an underscore. An example of an SEO-Friendly URL is “www.domain.com/this-is-the-domain“.
The words featuring after the domain name will usually indicate the section of the website that the webpage is located on. This is regarded as useful for web users, who will find websites easier to navigate if they feature this style of URL. It’s also useful for search engines, which will find it easier to index webpages correctly if they feature common keywords related to their content.