説明
Twitterコンポーネントは、Lightningアプリケーションビルダーを使用してモバイルビューのLightningページに追加できる標準のLightningコンポーネントです。連絡先のTwitterプロフィールと最近のツイートを表示します。

You can choose from all objects-even those you don't have permission to view. This lets you build report types for a variety of users. Once you save a report type, you can't change the primary object. If the primary object on a report type is a custom object, and the custom object is deleted, then the report type and any reports created from it are automatically deleted. If you remove an object from a report type, all references to that object and its associated objects are automatically removed from reports and dashboards based on that type. http://help.salesforce.com/apex/htviewhelpdoc?id=reports_defining_report_types.htm&language=en_us