Mitzvah - commandment. This tag is for questions about the nature of commandments or the status of being a commandment. (However, many particular commandments have their own tags.)
A mitzvah (מצוה) (pl. mitzvot or mitzvos (מצוות)) is a commandment. There are 613 mitzvot.
Mitzvot are divided into positive (עשה) and negative (לא תעשה) categories. There are 248 positive mitzvot, and 365 negative.