In French, people use special words called "honorifics" to show respect to others. It's sort of like saying "ma'am" or "sir" in English.
There are different honorifics that can be used depending on who you are talking to and how well you know them.
For example, if you are talking to a friend, you might use the word "tu" (pronounced too) to call them by their first name. But if you are talking to a stranger or someone you don't know well, you might use the word "vous" (pronounced voo) to show respect.
Also, if someone is older than you or has a higher position in society, like a teacher or boss, you might add an honorific before their name. For example, if you are talking to your teacher, you might call them "Madame" or "Monsieur" (pronounced mah-dahm or muh-syuh).
There are also other honorifics used for people with specific titles, like doctors or government officials.
The important thing to remember is that honorifics are a way to show respect and politeness in French, and it's always a good idea to use them when speaking to someone you don't know well or someone who deserves extra respect.