I would be pleased to answer if you'd add some clarifications. What kind of marketing on LinkedIN? Content marketing? Paid Promotion? And, since I've heard 100s of them, what is your definition of a landing page? A conversion-specific "squeeze" page? Or a page holding a valuable piece of content meant to whet the visitors information appetite?
It's hard to fully answer that question without more detail. In general, if you are advertising on Linkedin, I recommend you send them to a landing page on your website directly from the Linkedin ad. In our testing, it's worked the best.