What is the special Linked-In tag and where do I enter it? Part 2

In Part 1 of this rather ridiculous investigation… ridiculous since it should be so b. obvious but I can’t find the simple help… I messed about with doing the Linked In #hashtag just about everywhere in the post except the body. Actually I tried a number of combinations in image file names and Post Tags. Now I’m going to be a bit more direct #LinkedIn there. I’ve done it. So does it show up on my Linked In profile? No… maybe I need to wait a while. ….A while later. Nope LinkedIn appears to be ignoring me. Perhaps the secret is in the post title. Or is it in the post tags. This time I’ll wait for LinkedIn to have another shufty before I pass judgement. First trying LinkedIn without the #