Company Culture basically stands for how the employees within the company behave and function together. This includes values, beliefs, norms, everything that the employees represent. It usually comes top-down, meaning the management has an extremely important role in defining and sustaining the company culture, as they’re building up the startup. In the beginning, they will hire people similar to themselves or what they want to become.
Later on, HR has to put special attention on who is being hired, since that person has to fit into the company culture, just the technical job requirements are not enough. To ensure this, the management can define policies, like a set of gross misconduct to aligned with the culture of the startup.