Moti Shanti is performed in Jain tradition to bring peace, auspiciousness, and spiritual well-being.

It is done:

• to शांतify negative karmic effects,
• to create a pure and peaceful atmosphere,
• to pray for health, harmony, and protection for the family or community,
• and to remember the ideals of Ahimsa, Samyaktva, and inner calm.

In Jain understanding, the real purpose is not only external peace, but also inner peace of the soul through right faith, right conduct, and devotion.

If by “Moti Shanti” you mean the specific Jain vidhi or path, I can explain its meaning in simple words.