Data governance is governance with regard to data.

Other definitions are:

• Data governance is the cross-functional discipline of managing, improving, monitoring, maintaining, and protecting data (Askham).
• Data governance is the exercise of authority and control (planning, monitoring, and enforcement) over the management of data assets (DAMA-DMBOK, 2017).

Data governance is subtype of governance.

• Askham, Nicola. Data governance
  
• DAMA-DMBOK (2017). Data management body of knowledge.
• The Data Governance Institute. (2022, 24 maart). Data Governance: The Basic Information - The Data Governance Institute. https://datagovernance.com/the-data-governance-basics/adg-data-governance-basics/