Give the use for enabling knowledge user checkbox to any user

Hi Rohit, 

The Knowledge User checkbox grants a user access to Salesforce Knowledge

features. Enabling it allows the user to work with knowledge articles, provided they also have the appropriate object permissions and permission sets. 

Typical use cases include: 

• Create, edit, publish, archive, and manage Knowledge articles.
• Access the Knowledge tab and article management features.
• Contribute to an organization's knowledge base for agents and customers.
• Use Knowledge articles while resolving Cases in Service Cloud.
• Participate in article approval and publishing workflows (if configured).
• View article versions, translations, and data categories based on permissions.

Simply enabling the Knowledge User checkbox does not

grant full access by itself. The user must also be assigned the necessary permissions (such as Create, Read, Edit, Publish, or Manage on the Knowledge object) through a Profile or Permission Set. 

In short, enable the Knowledge User checkbox only for users who need to create or manage Salesforce Knowledge articles, such as support agents, knowledge managers, or content authors.