Meaning in this text
The cycle of birth, death, and rebirth driven by karma and desire. The Bhagavatam's central promise is that hearing and reciting its stories (shravana and kirtana) gradually purifies the heart and releases the soul from samsara without requiring other austerities.
On this site, Samsara is treated as a reading aid rather than a final doctrinal definition: use it to move from a question about a term into the chapters where the term actually appears.