Bhāgavata-dharma is that spiritual practice or religion directly given by the Supreme Lord. Bhāgavata-dharma is also called Bhakti Yoga. Bhakti means service, devotion or worship, yoga means connection. Connecting with the Supreme through loving devotion is called Bhakti Yoga. Bhakti Yoga is not a technique to be learned, but the primordial nature of the spiritual soul. 

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ye vai bhagavatā proktā upāyā hy ātma-labdhaye
añjaḥ puṁsām aviduṣāṁ viddhi bhāgavatān hi tān

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'Even ignorant living beings can very easily attain self-realization and God-realization by employing the means prescribed by the Supreme Lord Himself. The process recommended by the Lord is known as Bhāgavata-dharma'.
— Śrīmad-Bhāgavatam 11.2.34