Managed Metadata Service Application in SharePoint 2010 allows farm administrators to provide people permission to contribute to specific term store groups without giving them unnecessary permission to mess with any other part of the service application or Central Administration. This is by adding them to Contributors section of the intended term store group. Even though they are added into this group, they may not be able to access the term store with the same URL that the farm administrator uses (directly from Central Administration site). Instead they will require to go into a site they are an owner of (they should have access to Site Actions menu) and to take ‘Site Actions > Term Store Management’ in Site Administration section. If the user is not a site owner in any sites and doesn’t have access to Site Actions menu, they can enter the following URL directly into the browser. The user must at least have read permission into the site.