Search engine friendly (SEF) are URLs that make sense to both humans and search engines because they explain the path to the particular page they point to.
A friendly URL is a Web address that is easy to read and includes words that describe the content of the webpage. This type of URL can be "friendly" in two ways.
1) It can help visitors remember the Web address.
2) it can help describe the page to search engines.
SEO friendly URLs are those that contain keywords and the webpage title in the domain URL. This helps crawlers and browsers read your URL and know about your webpage content easily.
One of the most basic search engine optimization techniques is in using SEO-friendly URL structures. A good structure can help the indexation process of your website, but, unfortunately, there are plenty of websites that use incorrect, suboptimal URLs. Here I am sharing an informative post about "How to make you URL's SEO friendly". Click here: https://www.dealerassistnow.com/15-tips-seo-friendly-url/