What happens when you order
You put your link in the box and press the button. The next screen opens with it already filled in. You choose how many post likes you want, pay, and the order starts after that.
Where to find it
Open the three-dot menu at the top right of the post and pick Copy link to post.
Check this first
Set the post's visibility to Anyone. Posts limited to Connections can't be reached.
Why order LinkedIn post likes
LinkedIn tests every post on a small slice of your network first. Strong early reactions are what push it out to second- and third-degree connections.