How can Salesforce users share records with internal groups?

Salesforce provides several mechanisms for sharing records, and the ability to use role hierarchies and manual sharing is a fundamental aspect of this functionality.

Role hierarchies allow organizations to set up a structure where users can access records owned by users lower in the hierarchy. This means that a manager can view and edit records belonging to their team members, enabling better collaboration and oversight within the organization.

Manual sharing gives users the flexibility to share specific records on an individual basis, regardless of the role hierarchy. This can be useful in situations where a user requires access to a colleague's record but does not belong to a role that typically grants such access. By manually sharing a record, a user can specify which internal groups or users should have access.

Both mechanisms are essential for facilitating collaboration among internal users while maintaining control over data access. This combination of automated and manual options ensures that users have the necessary access to perform their roles effectively while keeping data security intact.

The other options do not correctly represent how internal sharing works within Salesforce. Using external APIs does not relate to sharing records internally, and creating random sharing settings would not provide a structured or secure way to manage data access. Email notifications are a means of communication rather than a method of sharing records.