Account, opportunity, and case teams are tools that will allow automatic sharing of records to certain users defined in the personal settings of each user. The user with whom the record is shared is called a team member and can have read-only or read/write access to the owner’s record. Team roles for these members can also be defined as indicative.
Example: A shares the account records that he owns with B and C. That is, B and C will be able to read and / or write A’s records even though they are not owners.. B has a team role of Sales Rep and C of Project Manager.
Teams are only available on accounts, opportunities and cases.