Hi @KalpanaJadhav ,
If we are not talking about Dataverse for Teams (which is a bit different) - you manage table level permissions via Security Roles because access to Dataverse tables are driven by role based security.
Only users who are granted with either a Dynamics 365 Service Admin, Office 365 Power Platform Admin, System Admin and System Customizer role will have access to the underlying tables.
Typically, you will want users to have access to an App (whether Model Driven or Canvas) with the permission to read, edit, create and delete items in the tables from the App interface only and not directly in the underlying table.
To achieve this you would edit the permissions of an existing security role, or ideally create a copy of an existing security role and customize it based on your needs.
You can manage table level permissions via Admin Centre > Environments > Your Environment > Settings > Security Roles.
Further reading:
https://learn.microsoft.com/en-us/power-platform/admin/database-security
Similar question explained very well by @EricRegnier
https://powerusers.microsoft.com/t5/Microsoft-Dataverse/Dataverse-Environment-and-Table-Permission/t...
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