Sharing rules are automatic exceptions to organization-wide sharing settings that grant additional access to records based on record ownership or criteria. By creating a sharing rule on the Account object for all members of the account services role to have Read/Write access, the administrator can allow users in that role to edit and change ownership of Accounts owned by any of their team members, regardless of the organization-wide sharing setting for Account. References:
https://help.salesforce.com/s/articleView?id=sf.security_sharing_rules.htm&type=5