The three Deities-Madana-mohana, Govinda and Gopījana-vallabha-have very specific qualities. Worship of Madana-mohana is on the platform of reestablishing our forgotten relationship with the Personality of Godhead. In the material world we are presently in utter ignorance of our eternal relationship with the Supreme Lord. Paṅgoḥ refers to one who cannot move independently by his own strength, and manda-mateḥ is one who is less intelligent because he is too absorbed in materialistic activities. It is best for such persons not to aspire for success in fruitive activities or mental speculation, but instead simply to surrender to the Supreme Personality of Godhead. The perfection of life is simply to surrender to the Supreme. In the beginning of our spiritual life we must therefore worship Madana-mohana so that He may attract us and nullify our attachment for material sense gratification. This relationship with Madana-mohana is necessary for neophyte devotees. When one wishes to render service to the Lord with strong attachment, one then worships Govinda on the platform of transcendental service. Govinda is the reservoir of all pleasures. When by the grace of Kṛṣṇa and the devotees one reaches perfection in devotional service, he can appreciate Kṛṣṇa as Gopījana-vallabha, the pleasure Deity of the damsels of Vraja.
Lord Śrī Caitanya Mahāprabhu explained this mode of devotional service in three stages, and therefore these worshipable Deities were installed in Vṛndāvana by different Gosvāmīs. They are very dear to the Gauḍīya Vaiṣṇavas there, who visit the temples at least once a day. Besides the temples of these three Deities, many other temples have been established in Vṛndāvana, such as the temple of Rādhā-Dāmodara of Jīva Gosvāmī, the temple of Śyāmasundara of Śyāmānanda Gosvāmī, the temple of Gokulānanda of Lokanātha Gosvāmī, and the temple of Rādhā-ramaṇa of Gopāla Bhaṭṭa Gosvāmī. There are seven principal temples over four hundred years old that are the most important of the five thousand temples now existing in Vṛndāvana.
Ref >> Srila Prabhupada Vani.