Rated 3 out of 5 stars

I installed this addon, but it is fully unclear what it should do.
Hovering an image I get "face label". Clicking on this I get two buttons - "Send" and "Close"
Clicking on "Send" - no effect.
Clicking on "Close" - closes this dialog.
And where it was sent and was it sent at all I don't know.
Can you give some more explanation regarding this addon? So far - only 3 stars...
Thank you