Meaning of the word "one two" in English

What does "one two" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

one two

US /ˌwʌnˈtuː/
UK /ˌwʌnˈtuː/

Exclamation

a phrase used to count or to indicate a sequence, often in preparation for an action

Example:
Ready? One, two, three, go!
The instructor counted, "One, two, one, two," as we marched.