One of the things I have come to believe strongly is that culture is real; it’s also incredibly important, and it’s something that many people don’t understand at all. It’s both an easy, natural consequence of your company’s evolution and something that can quickly become a problem if you don’t tend to it.

Consciously guiding the culture of your team is part of a leader’s job, and to do this well, you need to understand what it means in the first place. So what is culture? Culture is the generally unspoken shared rules of a community.

— The Manager’s Path: A Guide for Tech Leaders Navigating Growth and Change by Camille Fournier