Many Buddhists try to follow the Great (Maha) Vehicle (Yana), but still have doubts & questions. In this sutra Buddha teaches them how to develop confidence & trust in the Great Vehicle.
The Introduction by the translators says:
Cultivating Trust in the Great Vehicle unfolds at Vulture Peak Mountain, where
the Buddha, surrounded by a great number of bodhisattvas from the human
and nonhuman realms and many monks and limitless other beings, gives a
discourse on the nature of trust in the Great Vehicle. The teaching is
requested by a bodhisattva known as Great Skillful Trust, who requests the
Buddha to answer four questions concerning the nature of trust in the Great Vehicle:
1. What are the characteristics of trust in the Great Vehicle?
2. How is trust aroused?
3. What are the different types of trust?
4. What are the benefits of having trust?
Over the course of the sūtra, the Buddha answers all four questions,
devoting a separate chapter to each.
Cultivating Trust in the Great Vehicle | 84000 Reading Room