Homa is a Sanskrit word that refers to a ritual, wherein an oblation or any religious offering is made into fire.
Thila Homam is a powerful Vedic ritual for People having Pithru Dosha or unnatural death of any family members, Also non performance of srardhams/ Tarpana and other rituals to our ancestors will create problems in our life.
Pithru Dosham can be classifid in many ways; it is said that the curse of departed souls, when going against their will, curses the person who defies their wish. This can be classified to failure of performing the rituals, that are basically part of their birth Karma to perform the Pithru Karmas.
Maharshi vedvyas as stated homa, or havan as a offering of intensive poojas to different gods, and goddess performed for a particular deity by invoking Agni,the god of fire.
homas are powerful ancient fire rituals that ahve been performed in India by the vedic ages for over 5000 years. people perform and attend homa pooja to get peace and happiness of mind, peace at home and workplace, for protection from miseries, fulfillment, of wishes and for spiritual benefits.
it is also done for prosperity, material abundence. it is also done for a speedy recovery from illness, for starting a new busines or a new project so that no evil forces or effects can hamper the growth, to remove troubles that prevent us from starting a sprititual path, for a smooth life, peace, and harmony in the family, to improve family relations, for sustaining the family, for departed souls.
homa is also done to remove black magic, evil forces, obstacles and negative vibration around a person and family and work plcas that hinder the progess and prosperity, busines losses, distress etc.