Meaning of the word "first impressions are the most lasting" in English

What does "first impressions are the most lasting" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

first impressions are the most lasting

US /fɜrst ɪmˈprɛʃənz ɑr ðə moʊst ˈlæstɪŋ/
UK /fɜːst ɪmˈprɛʃənz ɑː ðə məʊst ˈlɑːstɪŋ/
"first impressions are the most lasting" picture

Idiom

the initial opinion or feeling a person has about someone or something is very difficult to change

Example:
Dress professionally for the interview because first impressions are the most lasting.
He tried to be polite, knowing that first impressions are the most lasting.