Clarify use of database

Author: duncanmcclean

README.md

@@ -20,7 +20,7 @@ composer require statamic/importer
 You can find the Importer addon in the Control Panel under `Utilities > Importer`.
 
 > **Note:**
-> Before installing the importer addon, please ensure your project has a database setup. If you created your site using the [Statamic CLI](https://github.com/statamic/cli), a SQLite database will have been configured. You can confirm by running `php artisan migrate`.
+> Before installing the importer addon, please ensure your project has a database configured. This importer uses a database to keep track of import progress. If you created your site using the [Statamic CLI](https://github.com/statamic/cli), a SQLite database will have been setup for you. You can confirm by running `php artisan migrate`.
 
 <!-- statamic:hide -->
 ## Documentation