QUESTIONS ABOUT INSTAGRAM ICON

[andreaalvise]

Surfing the internet I read an article on a website. In the article there was an Instagram video with several icons (likes, comments...) and also this icon (I attach a photo to the post). For who has Instagram, what does it means ? I tried to click on it but nothing happens, if I click on the other icons it redirects me to instagram (ex: if I click on the like icon I get the message "log in to instagram to like", that is an input occurs). I repeat that I was on another site, I read an article with this video and this icon attached. What does the icon means? Did I accidentally share something ?
I am available for further clarification if I have not been clear

 

[puppykickr]

That is the upload icon.

You use it to upload content, and it is on many sites and apps.

You must have an account and be logged in for it to work on Instagram, and for most other sites as well.