brainliest means the answer that is best and you found it very
if you ask any question and 2 persons gave you answer for your question and the answer of one person you liked the most and found it most the we can mark it as brainliest . at the side of every person's answer an option of brainliet then we can appericiate the user by marking it as brainlist
if someone marks our answer as brainliest then we can get ranks also
done.