Breakdown:
* Yo: I (subject pronoun)
* voy: present tense of "ir" (to go)
* a: to (preposition)
Examples:
* Yo voy a la escuela. (I am going to school.)
* Yo voy a comer. (I am going to eat.)
* Yo voy a viajar a México. (I am going to travel to Mexico.)
Note:
This phrase is used to express an intention or a future action. It can be used in both formal and informal contexts.