What does it mean to be polite ?

 What does it mean to be kind?Being polite is a subjective experession.Sometimes it different means in diffirent places .For example,like mark(👍)means great,ok in Western culture.But in South America,İraq,Afghanistan and Iran it means "move it".If I had to give another example,in most parts of the world it's rude to make eye contact with someone who's higer than you .But making eye contact in America is very important.Not making eye contact means you are rude and liar in America.The only constant is the word polite has  good meaning and the word rude has bad meaning.