Explicit Vs Implicit Sharing

Explicit sharing means that the admin must be aware of the fact that objects share common data like sharing the record with different ways Sharing rule, Account team etc. Implicit sharing means that the sharing mechanism takes place behind the scenes and the admin does not need to worry about it.

There are some instances where a user can view a private record without being granted access to it. When you have access to a record, you automatically receive access to read its parent record (if you can see a contact, you can see its account). The same is true for seeing child records. This concept is called Implicit Sharing, and only ever provides read access (never write access).

Type of Sharing:

1. Parent Implicit Sharing: Read-only access to the parent account for a user with access to a child record. Read-only access to the parent account for a user with access to a child record
2. Child Implicit Sharing: This sharing provides access to child records if the user is the owner of the parent record. Child implicit sharing only applies to contact, opportunity, and case objects (children of the account)
3. Portal Implicit Sharing: Access to portal account and all associated contacts for all portal users under that account
4. High Volume Portal Implicit Sharing: In this Implicit sharing any record owned by high volume portal users will be shared with other high volume users who are part of the Sharing set.
5. High Volume Parent Implicit Sharing: In this implicit sharing, read-only access will be given to parent account of records shared through a sharing set to other user members.