Where you shared it
I think it is this comment:
@StevenB.Segletes I know it (see the first words of this answer of mine: tex.stackexchange.com/a/367156/101651), I'd like to have an expert answer about the topic that can be linked every time one have to explain it to a new user. – CarLaTeX May 19 '17 at 19:05
How I found it
What is the link?
To get the Announcer badge, there must be a link which has got more than 25 views (from 25 different IP addresses, of course) which ends by your UserID (101651).
The linked question has three posts which can give you such a link:
Of those links, I think you must have got the badge for the link to your answer (the last listed above). So I only searched for that link and ignore the others, however you may try to find the other links.
Search for the link inside questions and answers
I used the search filter of Stack Exchange and I found nothing.
Search for the link inside comments (but also Qs and As as well)
A simple Google search points me to only two posts
Now it is easy. Just read your questions and comments there, move the cursor to every link inside them, and check if the link is
https://tex.stackexchange.com/a/367156/101651. And I found the linked comment as the first result. (I
return 0; right after that, but you may continue searching there.)