The word Tantra is used in the Nectar of Devotion. When Mahamantra and other mantras are there why do we need tantras in this material world. What is the exact meaning of tantras?
We follow nirguna-tantras, that are favorable to our aspiration in the line of Gaudiya-Vaisnavism. Real tantra means that process which helps establish us in our eternal spiritual form and service. These processes are important. A tantra is like a procedure. For example, the different procedures in our stages of sadhana, these can be considered like a tantra.