This question already has an answer here:
In many cases, we have to make a special attention to specific part of code, and Arrows are great way for that. Is it possible, that CharMap (or at least several SpecialSymbols were added into post EDITOR (for Superuser, Stackoverflow and several other coding SO sites)? so, we can quickly insert those symbols/arrows into answer.
(Btw, or there could be a way to mark the part of code which should cause more attention to it... i.e. making the color of the word RED and BOLDED)
p.s. why you thought that i am including them in questions? I said while Answering to questions, it is usable for. So, it's not me who uses these chars, but any of answer-er.