URL shortening is a technique on the World Wide Web in which a Uniform Resource Locator (URL) may be made substantially shorter and still direct to the required page. This is achieved by using a redirect which links to the web page that has a long URL. For example, the URL “https://example.com/assets/category_B/subcategory_C/Foo/” can be shortened to “https://bit.ly/Foo”, and the URL “https://example.com/about/index.html” can be shortened to “https://bit.ly/aO3Ssc ”
You can activate the short URLs for sharing from Social Sharing -> Short URL.