Both "ma'am" and "mam" are used as polite forms of address for a woman, particularly in English-speaking cultures. However, the correct and more widely accepted term is "ma'am."
"Ma'am" is the standard short form of "madam," which is a respectful and formal way to address a woman. It is commonly used in professional settings, such as when addressing a teacher, a customer, a superior at work, or any woman you want to show respect to.
"Mam" is a less common variation and may be considered a misspelling or informal version of "ma'am." While it might be used in certain regions or informal contexts, "ma'am" is generally the preferred and more appropriate term.
If you are unsure which one to use, it's safer to opt for "ma'am" in formal situations to show respect and politeness.