tracking anime doesn't mean shit. It's just for bragging rights like "wow, this guy has watched more anime than me; I should kill myself." It doesn't go towards anything and pretty pointless if you look at it, because if you give an anime a rating, there will always be someone to disagree with you and your opinion becomes nothing. If you liked a certain series, well good for you, no one gives a shit.
tl;dr unless you got some fucking alzheimer's and/or you don't have a clue wtf you're doing/u r from mal, then you don't need it.
not hating on u or anything, but the concept of "tracking what you watched" is dumb