Individuals who believe their talents can be developed (through hard work, good strategies, and input from others) have a growth mindset. They tend to achieve more than those with a more fixed mindset (those who believe their talents are innate gifts). This is because they worry less about looking smart and they put more energy into learning.
My observation of the managers I work for is that when they talk about “growth” they mean financial (revenue and profit) growth, not at all what is described in this article. Perhaps that is a difference between managers and leaders?