Lord Shiva represents the aspect of the Supreme Being and is considered to be the destroyer of evil and sorrow. Shiva is 'tri netra' or three eyed, and is 'neela kantha' - blue necked. Shiva - Nataraja is the Divine Cosmic Dancer. Shiva - Ardhanareeswara is both man and woman. He is the source of fertility in all living beings. He has gentle as well as fierce forms. Shiva is the greatest of renouncers as well as the ideal lover. He destroyes evil and protects good. He bestows prosperity on worshipers although he is austere. He is omnipresent and resides in everyone as pure consciousness.
Lord Shiva is the Lord of mercy and compassion. He protects devotees from evil forces such as lust, greed, and anger. He grants boons, bestows grace and awakens wisdom in His devotees. Lord Shiva is the third member of the Hindu Trinity, the other two being Lord Brahma and Lord Vishnu. Owing to His cosmic activity of dissolution and recreation, the words destroyer and destruction have been erroneously associated with Lord Shiva.
In this puja Lord Shiva is worshipped in the form of Linga or Lingam and abhishek is performed with different articles like flowers, belpatra, milk, coconut water, honey, curd sugarcane juice etc.
Rudrabhisheka is believed to be a very good Homam performed with powerful hymns/mantras and it fulfills all the wishes of the person who gets it performed. This Homam bestows prosperity, fulfillment of all desires, it removes negativity, cut off the negative karma and give all round happiness in life.
This Pooja, where Lord Shiva is worshiped in his Rudra form, is hailed by all Vedic scriptures as one of the greatest Poojas to remove all evils, to attain all desires and for all round prosperity. In this Pooja after the traditional Ganesha Pooja, Kalasha sthapana etc, the Shiva Linga sthapana is done. Then Laghunyasa is recited. The Shivopasana mantra and the 108 names of Lord Shiva are recited. Then Sri Rudram (chapter 16 & 18 of Yajur Veda) is recited and the Shiva Linga abhishekam is done with the prescribed 11 ingredients like water, milk, curd, ghee, honey etc.
The Sri Rudram identifies 346 desires of human beings to be fulfilled to have a peaceful daily life and invokes Lord Rudra to fulfill all of them. The Astrology scriptures have repeatedly prescribed this as a remedy for several planetary Doshas. Whether you want peace or prosperity, progeny or progress in profession, health or wealth the Rudrabhishekam Pooja is the ideal one. It will be done in your name and with your sankalpa, i.e., the specific purpose for which you are getting the pooja performed.