If you are here, then you clicked on "█" which is a "Block Element," specifically the " Full block," and it can be written using alt codes. It is 219, according to an alt codes website.
When some form of text is replaced with "█" most of the time, it is something that is Not for publication, not made public. Sometimes it might be temporary for me to add later. Sometimes it might stay undisclosed forever or for a certain amount of time. Or it could be restricted.