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Ir vs. acudir

The Spanish verbs ir and acudir both translate to to go in English. However, they are not used interchangeably due to slight differences in context and use.

Ir

A1
Ir is a general term for to go in Spanish. It is used in a variety of contexts and can be used to indicate direction or movement from one place to another.
Voy a la tienda.
(I am going to the store.)
Deberíamos ir al cine esta noche.
(We should go to the movies tonight.)
Ella va a la universidad.
(She goes to university.)

Acudir

B2
Acudir is also translated as to go, but it connotes responding to a call, attending a function, or fulfilling an obligation. It is often used in more formal or specific contexts.
Acudo a la reunión mañana.
(I am attending the meeting tomorrow.)
El doctor acudió al llamado de urgencia.
(The doctor responded to the emergency call.)
Los invitados acudieron a la boda.
(The guests attended the wedding.)

Summary

Ir and acudir both translate as to go, but they are used in different contexts. While ir is more general and applicable, acudir involves responding or fulfilling something.