How important is it for a company to have a company page on LinkedIn?

Should that company be posting via its company page or via its employee's personal LinkedIn pages?

Does LinkedIn even share posts from a company as widely as they share posts from a person?

Let's say you're at a company, you're a sales person at a company, you're not the CEO, should you rely on the company to post, or should the individuals at that company post?

 Why is it important to stay top of mind with people?

How does my activity on LinkedIn show up on the rest of the internet, namely Google, Bing, Yahoo searches?

When people are searching for me how public is my activity on LinkedIn? My likes, my comments, my engagement?

What about things that I'm liking and commenting on?

Is there any way to make your articles private LinkedIn doing only? For some reason if anyone wants to do that?

What is the difference between a post and an article on LinkedIn?

Why then would I ever write an article? No one ever sees it, unless I share it as a post. Why don't I just write a bunch of posts?