Create a Long Text Field for the Descriptions

Here's how to create the long-text field to save the account descriptions.

1. Enter a sandbox with Application Composer.
2. Open Application Composer.
3. In the left pane, expand Standard Objects > Account.
4. Expand the Account node.
5. Click Fields.
6. In the Fields page, click Create Custom Field.
7. On the Select Field Type window, select Long Text.
8. In the Display Label field, enter Account Description.
9. Make sure the Updatable and Include in Service Payload checkboxes are selected.
10. Click Save and Close.
11. Click the sandbox name and select Publish.
12. On the Sandbox Details page, click Publish again.