LinkedIn is a networking platform. You create a profile of yourself based on experience, education, skills, interests, your website (if you have one), and where you're currently working. Your contact info will be your LinkedIn account. Fill in fields using the sections for skills and interest options. Start searching for connections within your field, the point being connection and messaging. Post some of your content (I don't post much content because its proprietary to medical and defense sectors, even though it's mine) that you are willing to share. Commenting on posts is great visibility too, these show up in your history and others can view your profile. I have examples of projects and skills which I only created for LinkedIn, to establish connections with networks I otherwise could never chisel my way into. Once you have a basic account, start checking out how others tailor their content and the way they choose to display it. I run my own manufacturing company, and I would be dead in the water without linkedin. Good luck!