A database is only as good as the information it contains. It is important to edit the information in your database to keep it accurate and up-to-date. You can update and modify both spatial (features on a map) and non-spatial data (stand-alone table of sales figures) through the Table view.
To get started, double-click any cell and immediately starting editing that value (use the F2 key as a shortcut). Press Tab to move from field to field in the table to edit the attributes of a single row. Press Enter to commit a value to a cell that is being edited. When you move between rows that have been edited, you are committing your edits to memory. Only after you click Save in the Manage Edits group on the Edit tab, will your edits be committed to the database. Edits to the table participate in the undo/redo stack for the application. Use Fields view to create, modify, and delete fields.
Some attributes are not editable in the table. All managed fields such as ObjectID, Shape_Length, and Shape_Area are not editable. You will also be restricted from editing fields that have been demarcated Read-Only for the layer in the Fields view of the table. You can edit joined tables, but only the base table fields—fields from the joined table—are read-only.
There are many ways to add data to tables, including using geoprocessing, using the Attributes pane, or by creating relationships between datasets.