Answer:
Nirvana means a kind of state where a person is perfectly happy and does not feel any emotions like suffering, desire, and sadness. this is from the effects of Karma( what goes around comes around) and it represents the last goal of Buddhism.
Step-by-step explanation:
Siddhartha Gautama achieved it by deep meditation and he reflected on his experience of life. He broke the cycle of rebirth and entered nirvana. Thank you! :)