Communities are sites within a portal designed for a specific audience or task, such as collaborative projects. You might have communities based on departments in your company. For example, the Marketing department might have a community containing press information, leads volumes, a trade show calendar, and so on. The Engineering department might have a separate community containing project milestones, regulatory compliance requirements, and technical specifications.

• To view the communities to which you belong, open the My Communities menu.
• To display a community, in the My Communities menu, click the community name.
• To display a page in the community, in the community title bar, click the name of the page.
• To view the Community Knowledge Directory, in the community title bar, click Community Knowledge Directory. This link is available only if the community administrator has enabled the Community Knowledge Directory. The Community Knowledge Directory displays the members of the community, any subcommunities of the community, and any other folders and contents the community administrator added.
• To view the subcommunities to which you belong, open the Subcommunities menu. This menu appears only if this community contains any subcommunities. Subcommunities are separately secured subsections of a community. For example, you might have a Marketing community that contains the Advertising Subcommunity. The Advertising Subcommunity could have distinct owners; or only a subset of the Marketing community might be entitled to see the Advertising Subcommunity.
• To view a subcommunity, in the Subcommunities menu, click the subcommunity name.
• To join the community you are viewing, click Join this community.
  Note: You see this option only if you are not already subscribed to the community.
  Tip: You can also join communities by clicking My Communities > Join Communities. For more information on joining communities, see Joining Communities.
• To unsubscribe from a community, click Unsubscribe from this community.
  Note: You see this option only if you are a member of this community and only if your membership is not mandatory.
  Tip: You can also unsubscribe from communities by clicking My Communities > Unsubscribe Communities . For more information on unsubscribing from communities, see Unsubscribing from Communities.