A more thorough explanation:

Tacit law is a type of law that is not written down in a statute or legal code, but is instead based on the consent and customs of a society. It is a law that is understood and followed by people without being explicitly stated.

For example, in some cultures, it is considered rude to speak loudly in public places. This is not a law that is written down, but it is a tacit law that is understood and followed by members of that society. Similarly, in some workplaces, there may be an unwritten rule that employees should dress professionally. This is another example of tacit law.

Tacit law is important because it helps to regulate behavior and maintain social order, even in situations where there may not be a specific law or rule in place. It is based on the shared values and customs of a society, and is often enforced through social pressure rather than legal consequences.