Accounts are organizations with which user has a relationship. Accounts can also contain other types of records including prospects, vendors, business partners, and other organizations that interact with user’s organization.
Contacts are individual people with whom user has a relationship. Often contacts are related to an account, but certain organizations and businesses may serve or sell to individual consumers, and so most of the contacts will not be under accounts.
The relationship between the account and contact records is one-to-many, such that there can be many contacts associated with a single account. The account relationship to contact is a parental relationship. When the account owner changes, the contact owner changes as well. For more complex relationships, user needs to use Connections to relate accounts and contacts together. The contact fields are also mapped from the account so if user creates a contact from an account record, the account address and phone will map to the contact.