Hello all. I am very unfamiliar with solvers but am trying to nail down preflop ranges. I was wondering about Ev diff. If it say the Ev is -0.01 I does that mean it’s losing 1bb/100 hands or something else. Also what is an appropriate buffer in Ev diff where the action of raising and folding is indifferent. Like if I fold a hand and am -0.03 is that still ok?

Thank you for your help.
Sincerely,
Mike