A content delivery allows you to convert documents such as Microsoft® PowerPoint and Word files into an optimized web-based version for easy online viewing. After you create your delivery, you can send its encrypted URL to any recipient, such as leads, customers, partners, and colleagues, and then track how often people view or download the content. Content deliveries are available in Salesforce Classic only. However, Lightning Email generates delivery-based links as email attachments for Lightning Experience users who have access to the Content Deliveries feature.