Rebrandly offers a fast, easy, and free link shortener that allows users to shorten links and track them using a unique URL. The service can be used on any social media platform, website, SMS, email, or ad. Rebrandly provides features such as generating QR codes, creating custom domains, and accessing detailed analytics for tracking link performance. With over 1 billion branded links created annually, the company claims to support smart companies like the world's most successful ones. The service is free for short-term use, with paid plans available for larger usage.