Among the four ages – Satya, Treta, Dvapara and Kali, Kali-yuga is the best.
“It is stated here that among the four ages — Satya, Tretā, Dvāpara and Kali — Kali-yuga is actually the best because in this age the Lord mercifully distributes the highest perfection of consciousness, namely Kṛṣṇa consciousness, very freely. The word ārya has been defined by Śrīla Prabhupāda as “one who is advancing spiritually.” The nature of an advanced person is to search for the essence of life. For example, the essence of the material body is not the body itself but the spirit soul that is within the body; therefore an intelligent person gives more attention to the eternal spirit soul than to the temporary body. Similarly, although Kali-yuga is considered to be an ocean of contamination, there is also an ocean of good fortune in Kali-yuga, namely the saṅkīrtana movement. In other words, all of the degraded qualities of this age are completely counteracted by the process of chanting the holy names of the Lord. Thus it is stated in the Vedic language,
dhyāyan kṛte yajan yajñais tretāyāṁ dvāpare ’rcayan
yad āpnoti tad āpnoti kalau saṅkīrtya keśavam
“Whatever is achieved in Satya-yuga by meditation, in Tretā by offering ritual sacrifices and in Dvāpara by temple worship is achieved in Kali-yuga by chanting the names of Lord Keśava congregationally.”
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Eleventh Canto, Chapter 05 – Text 36.