Shanti pooja in Jain practice is usually done as part of a larger puja ritual to seek peace for all beings. Here is the simple idea:

• When to do it:

- During Snatra Puja (the praise/abhishek ritual for a Tirthankar). In Snatra Puja, a peace-focused offering often accompanies the ceremony, especially at the Shanti Kalash or Shanti dhara part of the ritual. It is also performed on occasions when one wants to invite peace and remove obstacles (birthdays, anniversaries, during illness, or at temple ceremonies). ( jainknowledge.com) - In many communities, Shanti is a regular component of the nine-limb puja (Nav Angh) and prayers for auspiciousness and calm. ( jainknowledge.com)

• What it means (arth):

- Shanti pooja expresses a sincere wish for inner peace, harmony in the family, and peace for all living beings. It is a devotional act to cleanse karma related to disturbance, fear, or conflict, and to invite auspiciousness into the space and the soul. Different Jain traditions describe the same aim with slightly different phrasing, but the core is universal peace (shanti) for all beings. ( jainknowledge.com)

• Digambar vs. Shwetambar notes:

- The general practice of including shanti in Snatra Puja is common, but the exact form and emphasis can vary by tradition and temple. Some places may emphasize a Shantinath-centered form in Snatra, while others use a more generalized Shanti paath. The essential idea—praying for universal peace—remains the same in both traditions. ( jainknowledge.com)

If you want, I can point you to the precise verses or creation of a Shanti paath used in a particular tradition. You can read more here and here