Reactions - What does Visible mean?

[DigNap15]

Hello
I can't find the XF User Manual so...
With the ACP Content / Reactions page
There are 3 options
Active Visible and Delete
I cannot seem to find what Visible does if I unenabl it nothing seems to happen
What is it supposed to do?

Spoiler I am using Xon's Content Reactions Add -on


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