An administration is the time period in which your Evaluate survey is active for collecting student responses. Before creating your first administration, make sure Core Data has been imported, your evaluation is built, and your mailing templates are created. Then, in the Administration tab, select Create Administration in the term you've imported courses for.
Setup walks you through four steps: Administration Settings (name, evaluation, custom question permissions), Select Course Sections (all available, a custom segment, or pasted course IDs), Evaluation Dates, and Report Release Dates.
For more information, visit Setting up an Administration.