I saw that some people use the ">" for writing in stackexchange. For example, a post will appear as follows:
I love math.
When should I use ">" for writing? Can someone help me?
But I quite often use it also if I want to visually distinguish some part of the post.
I hope I do not violate some kind of SE network conventions in that way. (I do not know about any "SE network style guide" about using markdown elements. I suspect that more experienced users would have told me about it, if my use of blockquotes were incorrect.)
I have searched meta.SO a little, but I found only one question where something similar is discussed: Option to highlight the gist of the question.