This question already has an answer here:
Checking today this topic, they talk about the difference between
\par, and even a new line. And that people does not know the difference. And indeed, I don't know it.
Can you enlight me? And explain the main differences and good uses practices of each (if relevant?.
Related to this one is What is the difference between \newline and \\?, but in there there is not an in depth differentiation (which I will like to know), and don't talk about
\par or even blank lines.