I am a note, I should be used to highlight a paragraph that carries an important text which the reader should not miss, but I am not that important to be a warning. Examples here.
I am a code block, I serve to carry code examples. Examples here.
I am a tip, I contain various helpful information, tips, or tricks that are somehow related to the topic of the article or might be helpful to the reader, but they are not exactly related to the article itself, or the product (LA, PAP, FH). Examples here.
I am a warning. I should be used to highlight the most important crucial information and warnings what the reader definitely should not miss or otherwise something won't work. Examples here.
I am just a regular paragraph, which contains something that I want to highlight or separate from the normal text. Examples here.