The meaning of the mantra you provided is -
कर्पूरगौरं - One who has the complexion of camphor, which is white and radiant.
करुणावतारं - One who is the embodiment of compassion.
संसारसारं - One who is the essence of the entire universe.
भुजगेन्द्रहारम् - One who wears a garland of snakes.
सदा वसतं हृदयाविन्दे भवंभावनी सहितं नमामि - I bow to Shiva, who always resides in my heart with Parvati, the goddess of love and power.

The complete meaning of the mantra is:
I bow to Shiva, who has the complexion of camphor, who is the embodiment of compassion, who is the essence of the entire universe, and who wears a garland of snakes. May Shiva and Parvati always reside in my heart.

This mantra is a beautiful and powerful way to express devotion to Shiva. It is said to have many benefits, including:
Bringing peace and tranquility to the mind
Increasing compassion and understanding
Helping to overcome obstacles and achieve goals
Deepening one's spiritual connection