Data classification consultancy service is a service that helps organizations classify and protect their sensitive data by identifying, categorizing and labeling it according to its level of importance and the level of risk it poses if it were to be compromised. Data classification consultancy service is important for organizations that handle sensitive data as it allows them to ensure the security of their data and comply with relevant regulations and standards. Consultants who provide this service typically have expertise in data security and privacy, and can help organizations implement best practices for data classification and protection.