“Adya me saphalam janma” means:

“Today, my birth has become meaningful/successful.”

Arth

This line expresses joy and gratitude that by receiving spiritual guidance, darshan, or association with the Guru/Bhagwan, one feels that life has attained true purpose.

Bhavna

In Jain dharma, the real success of birth is:

• hearing the teachings of the Tirthankars,
• walking on the path of Ahimsa,
• reducing karma,
• and progressing toward moksha.

If you want, I can also give its full Sanskrit meaning or explain it in a simple devotional context.