You should worship Her to activate your spiritual awareness and consciousness, offer devotional service to the Supreme, and to liberate your soul from karmic bindings. Worshipping Her is considered the most appropriate worship for acquiring the best religious assets.
The energies of Sri-Sri Sita and Ram manifest fully on the ninth day of Chaiti Navratri. This is the day for the celebration of Ram Navami which marks the victory of good over evil. The celebration helps spreading the Divine Grace of Ram in the material world.