Job levels, also known as career levels or job grades, refer to the hierarchical structure within an organization. They are used to define the responsibilities, authority, and pay of different roles within the company.

Job levels can vary significantly from one organization to another, but in general, they are used to differentiate between roles that have more responsibility, authority, and pay, and those that have less. Some common job levels include:

1. Entry-level: These are typically entry-level positions that require little or no previous experience. They may involve performing basic tasks and learning the ropes of the organization.
2. Mid-level: These are typically positions that require some experience and are responsible for more complex tasks and projects.
3. Senior-level: These are typically more experienced positions with more responsibility and authority. They may involve managing teams or projects, and may require specialized skills or knowledge.
4. Executive-level: These are typically the highest level positions within an organization, such as CEO or COO. They are responsible for setting the overall direction and strategy of the company.

Job levels can be used to differentiate between roles within an organization and to determine pay scales. It is important to have a clear understanding of the job levels within an organization in order to ensure that roles are properly defined and that employees are appropriately compensated for their responsibilities.