If you mean Veyavachcha / Vaiyāvṛtya in Jain Dharma, it is the internal tapas of selfless service. It means serving the sadhu-sadhvi and also helping the needy with a pure, humble, and non-egoistic भावना. In Jain sources, it is described as one of the six internal austerities. ( jainknowledge.com)

Meaning

• Veyavachcha / Vaiyāvṛtya = selfless, respectful service. ( jainknowledge.com)
• In the Veyavachcha Garanam Sutra, the prayer is offered for those who render selfless service and bring peace to the Jain Shasan. ( jainknowledge.com)

Activities under it

The main activities generally included under Vaiyāvṛtya are:

• serving Jain monks and nuns with devotion,
• helping the sick, weak, elderly, or needy,
• arranging necessities for dharmic service,
• doing useful support work without expectation of praise or reward. ( jainknowledge.com)

In simple words

Vaiyāvṛtya is seva done as tapa — service that reduces ego, develops compassion, and supports dharma. It should be done with humility, discretion, and pure intention, not for show. This last point is an interpretive summary of the Jain emphasis on selfless service and internal purification. ( jainknowledge.com)

If you want, I can also give the 12 tapas list in Jainism with short meanings in simple Hindi/English.