Meaning of the word "civility costs nothing" in English

What does "civility costs nothing" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

civility costs nothing

US /sɪˈvɪl.ə.t̬i kɑːsts ˈnʌθ.ɪŋ/
UK /sɪˈvɪl.ə.ti kɒsts ˈnʌθ.ɪŋ/
"civility costs nothing" picture

Idiom

it does not require any effort or money to be polite to others, so one should always be courteous

Example:
There is no reason to be rude to the waiter; civility costs nothing.
Always remember that civility costs nothing but buys everything.