Write your own articles or contribute to LinkedIn's publishing platform to showcase your expertise. This will help establish your credibility and attract engagement from your connections. Be thoughtful and add value to conversations when engaging with others' content, it helps stay visible and foster relationships
Just like any other social media platform LinkedIn requires you to stay active, communicate with others (Like, Share, Comment), post your own content and articles, etc.
Remember, the basic rules of activity are same for all the social media platforms.