Meaning of triangle symbol

I would like to use the \blacktriangle symbol in my latex doucument, to symbolize something. Now I am wondering, if this is a symbol that has some kind of mathematical meaning, that I am not aware of. Does the symbol mean something or is it just some random graphic?

• According to approach0, that symbol hasn't been used on MSE or AoPS before. It doesn't mean nobody has used it, but it probably doesn't mean anything common – HallaSurvivor Jun 9 at 15:34
• Perhaps its used as a pointer... – Read my bio pls Jun 9 at 15:35
• Take into account that it will attract the eye. A handful of $\blacktriangle$ sprinkled around a page can be distracting. – plop Jun 9 at 15:37
• won't be useful once MSE brings the dark theme :D – Read my bio pls Jun 9 at 15:39