Questions & Answers about Анна гуляет в тихом парке.
Гулять means to stroll or walk for pleasure, with no fixed destination.
Идти (unidirectional) means to go on foot in one specific direction (perfective form of movement).
Ходить (multidirectional/imperfective) means to go on foot habitually or back and forth.
So гулять carries the nuance of a leisurely walk, while идти/ходить focus on the act of going from A to B or habitual movement.