The CIS Controls (version 8) are a prioritized set of 18 safeguards designed to be one of the most practical starting points for an organization with limited security resources.
Controls are grouped into three Implementation Groups (IG1, IG2, IG3), scaled to organization size and risk — IG1 covers essential cyber hygiene that almost any organization should have, while IG3 adds the depth larger or higher-risk organizations need. The list is deliberately concrete (e.g., "Inventory and Control of Enterprise Assets") rather than abstract, which makes it a popular baseline before tackling a heavier framework like ISO 27001.
Prioritized controls
Center for Internet Security
CIS Controls v8