A lot of businesses and individuals put out articles on their Linkedin page about whatever business they are in. These articles are the same as any other, using SEO and keywords to make that article more visible. Then they use links on those articles to either their business page or their individual page. The whole point of posting articles on LinkedIn is to populate peoples pages and captivate them with compelling content.
When it comes to trying to market a company via a social media marketing agency, making a stand-out company page is an important step to take. Treat the LinkedIn page as if it is the most important parts of the company website. Sometimes customers will find your company on LinkedIn before the website, so it is important to make it look reputable.