I am a new fairy hunter. What does it mean to wash BB to double nine? Grow to 90. Is the skill 900?

The growth speed of seeking immortality determines the increase of skill points when upgrading. Some people say that there is no difference between 90% growth and 100 growth. In fact, the growth of 90 pets increases by 54 skill points per level, and the growth of 100 pets increases by 60 skill points per level. According to the current level of 80, the difference between them is 480 skill points, which is equivalent to the price of 24 pills. In short, the higher the growth and initial skill points, the better.