3 Mukhi Rudraksha is the symbol of Three Deva i.e. (Brahma, Vishnu and Mahesha). The person who wears this Rudraksha will always get the blessings of three powers and accompanied by three Deva.

The wearer of this Rudraksha no longer remains an ordinary man since three power remains with the wearer always which help him to get success in all of his works.

The person who wears such Rudraksha has no difference of opinion in saying, thinking and doing in practical. The Rudraksha takes all the miseries and sorrow from the life of the wearer and makes the life full of happiness and comforts.

Three Mukhi as per the various Puranas : 3 Mukhi Rudraksha Bead is Known to be one of the most powerful Rudraksha for stopping all problems created in the past and existing in the present moment and about to take place in the Future.
The 3 Mukhi Rudraksha Bead is a life saver.

If a man is not liberated after Meditation and acquisition of Knowledge, he shall wear Rudraksha. He shall be freed from all sins and attain the highest goal. A Rudraksha of 3 Faces always bestows means of enjoyment. As a result of its power all lores become firmly established.

In the PADMA PURANA Chapter 57
THE LORD Said
The one with three mouths is Fire Himself; the sin earned in the past births of him on whom it remains is burnt as fire burns fuel. A wise man obtains that fruit which is obtained by worshipping Fire or by rites of honoring Fire or by offering the oblation of ghee; and also obtains heaven.

He who wears a Rudraksha of three mouths on his body is like Brahma on the earth. It would burn all the sins due to wicked deeds collected in birth after birth. There would be not disease in his belly; he would not be sick.

He is never defeated, and his house is not burnt by fire. These and all other fruits are obtained and destructive weapons also are warded off. Nothing inauspicious happens due to wearing of Rudraksha of three mouths i.e. when a Rudraksa of three mouths is worn on one's person.