"Vamos" is a Spanish verb that means "let's go" or "we go."

When to use it

'Vamos' is a Spanish word that means 'let's go' in English. People may use this word in informal settings or when speaking with people who are fluent in Spanish or familiar with the language. It may also be used in situations where the speaker is trying to convey a sense of excitement or urgency.

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Reference:

https://www.thelocal.es/20220218/vamos-ten-easy-but-very-useful-ways-to-use-this-great-word-in-spanish

Definition of vamos | Dictionary.com
Vamos definition, let’s go! (used as an exclamation of encouragement or exhortation): Vamos, amigos! See more.