LinkedIn is a social media website which is strictly focused on corporate people or people who are looking for a job. It's just like Facebook but for your career with a premium service subscription and no Targeted advertisements by selling user data. It works on the subscription-based model and it's marketing services. Thus it is secure and offers greater privacy of user data which is ideal for corporate people and companies. Many companies reach out by posting for job vacancies and HR are very active on this social media website. Thus it makes it easier for people and companies to connect with each other and people make connections with each other. You can post about your skills and people can endorse you for your skills. Or you can take a LinkedIn skill exam to prove your expertise and be beneficial for your potential HR or recruiter.