Thank you

Children in certain Western cultures are taught early on to say please and thank you reflexively, and the phrase itself has taken on a variety of nuances based on intonation, and can have various generally positive social effects.

Use of the phrase indicates politeness,[2] and in certain Western cultures, "parents put a lot of effort into teaching their children to be polite, to say 'thank you' or 'please' for every single favor done by anyone",[3] though the practice of quizzing children on what they should say has been criticized as framing the question in a negative context of the child being forgetful, and that the parent should merely remind the child to "Say please and thank you".

[5] Philosopher David J. Gunkel notes that "[i]t is now common for users to say 'thank you' to their digital assistants and speech dialogue systems (SDS), like Amazon's Echo/Alexa, Google Home, and Apple's Siri".

[7]In other environs, one study found that regular patrons of a restaurant gave bigger tips when servers wrote "Thank you" on their checks.

A 2012 Vanity Fair poll indicated that "thank you" was the phrase American travelers abroad, especially in east Asian Nations, felt was most important to learn how to say in the language of the country being visited.