OWD, Role Hierarchy, Sharing Rules, Manual Sharing in Salesforce | Record Level Security
Record Level Security in Salesforce determines which individual records users can view and edit in each object they have access to in their profile.
The permissions on a record are always evaluated according to a combination of object-level, field-level, and record-level permissions. This video will explain about all record level security options like OWD (Org-wide defaults ), role hierarchies, sharing rules and manual sharing.