With the help of the given below methods we can share records in Salesforce:

Role hierarchy:

• Whenever a user is added to a role, the user above the current user in the hierarchy of roles will have access to reading the records and inheriting the permissions.
• Follow the steps for role hierarchy: GO to Setup → FIND manage users' → roles → set up roles → click on ‘add role’ → provide name and click on save.

OWD:

• OWD(Organization-Wide Defaults) allows you to give permissions to the organization-wide and to define baseline setting for the organization. It is also HELPFUL in defining the user’s accessibility level to the user where a user can see other user’s records.
• OWD settings can be Public Read Only, Private, Public Read, and Write.
• Follow the steps for OWD: Go to Setup → find the Security Controls → click on ‘sharing settings’ → click on ‘Edit.

Manual sharing:

• Manual sharing is sharing a single record/file to a single user or group of users through manual access.
• We can see a BUTTON for manual sharing on the detail page of the record and it can be seen only when the OWD setting is private.

Criteria based sharing rules:

• If we want to share records based on conditions such as share records with a group of users with the criteria of the country is India.
• Follow the steps for criteria-based sharing rules: Go to Setup → security controls → sharing settings → select the object and provide name and conditions then click on save.

Apex sharing:

• Sharing object is available for each and every object in Salesforce. For example, the Account object’s share object is AccountShare.
• By using Apex, if we want to share the records then we have to create a record to the shared object.