How is access granted through the Role Hierarchy in salesforce?

Hi Piyush,

The role hierarchy automatically grants record access to users above the record owner in the hierarchy. By default, the Grant Access Using Hierarchiesoption is enabled for all objects, and it can only be changed for custom objects.

Thanks.

Sharing Settings in the Quick Find box, then select Sharing Settings. Next, click Edit in the Organization Wide Defaults section. Deselect Grant Access Using Hierarchies if you want to prevent users from gaining automatic access to data owned by or shared with their subordinates in the hierarchies.  Setting the organization-wide sharing defaults for each object, you can specify whether users have access to the data owned by or shared with their subordinates in the hierarchy. For example, the role hierarchy automatically grants record access to users above the record owner in the hierarchy.