LinkedIn names its new CEO | Poal: Say what you want.

No advertising, this includes "Free stuff for your whatever" type posts, even if you didn't write the post.
Posts must be about things businesses are doing. Posts that are nothing more than long writeups with links to things that "help your business" or explain "why you need this for your business" are advertising and fall under rule #1.
Keep memes and image posts on topic for what businesses are doing.
You're free to talk about what you've done in making your personal business a success, but talk about it in general terms. Don't give product names, pictures, or any kind of links.
Start at #1 and read the rules again.

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