To add/edit or review/approve content within the Admin Console, Optimizely <<product-name>> users must be assigned the appropriate roles:
ISC_ContentEditor – Add and edit content
ISC_ContentApprover – Preview, approve, and publish content
Note
Although it is not a requirement, Optimizely recommends that users with the ISC_ContentApprover also have the ISC_ContentEditor role to make minor edits to content prior to approving the revision.