LinkedIn is a professional networking platform with over 100 million users worldwide. The presentation provides guidance on creating an effective LinkedIn profile to represent Defaqto, including adding a photo, customizing the URL, and using information from Defaqto's website. It also reviews how to build connections, search for candidates, participate in groups, and use advanced search functions to help with recruitment and professional development. The goal is to create an interesting profile that positively represents Defaqto and builds the company's brand through an online presence on LinkedIn.