Salesforce Chatter is an enterprise social networking application that helps users connect to people and share business information. It can be accessed from the App Menu in the top-right corner of the Salesforce CRM screen. Chatter feeds can also be accessed from within the Salesforce CRM record pages. All users with a Salesforce license have access to Chatter, plus you can create new users who do not have Salesforce licenses but wish to have access to Chatter. These user licenses can access Chatter people, profiles, groups, and files. However, they cannot access any Salesforce object data.

Chatter Only user licenses can be created for users within your company, which are known as Chatter Free, plus employees not in your organization such as customers, known as Chatter External. These are shown in the following screenshot:

Another Chatter license (not shown in the preceding User License selection) is the Chatter Only license. This license is also known as Chatter Plus and...