'Brainliest' answer refers to 'the best answer' out of the two answers you get when asked a question. If you are the 'Author' or the 'asker' of the question, then only you can chose. After two answers have been given, you get an option to 'Mark as Brainliest Answer', for the answer you found the most useful. If you mark someone as Brainliest, you receive 25% of the total points of what you had assigned for the question. These answers can help you level up your ranks.
