# Dynamic Content

How to import, manage, and automate content in Letterhead

## RSS Feeds
- [How Letterhead Detects Duplicates in Your RSS Feed](https://help.tryletterhead.com/how-letterhead-detects-duplicates-in-your-rss-feed)
- [Revalidating Your RSS Feed in Letterhead](https://help.tryletterhead.com/revalidating-an-rss-feed-in-letterhead)
- [Understanding Advanced Feed Crawling in Letterhead](https://help.tryletterhead.com/understanding-advanced-feed-crawling-in-letterhead)
- [Adding RSS Feeds in Letterhead](https://help.tryletterhead.com/adding-rss-feeds-in-letterhead)
- [Automatically Tag New RSS Feed Items](https://help.tryletterhead.com/automatically-tag-new-rss-feed-items)

## Managing Curations
- [How Does Letterhead Automatically Delete Old Curations?](https://help.tryletterhead.com/when-does-letterhead-automatically-delete-old-curations)
- [Managing Your Curation Library](https://help.tryletterhead.com/managing-your-curation-library)
- [Manually Adding Articles to Your Curations Library in Letterhead](https://help.tryletterhead.com/curating-an-article)
- [When to Use Curations or URL Blocks in Your Newsletter](https://help.tryletterhead.com/difference-between-curations-url-and-rss-feeds)
- [How to Use the Letterhead WordPress Plugin](https://help.tryletterhead.com/connecting-your-wordpress-site-with-letterhead)
- [Automatic IAB Categorization: Organizing Your Curations](https://help.tryletterhead.com/automatic-iab-categorization-organizing-your-curations)

## Letterhead Browser Extension
- [Why is the Letterhead browser extension and/or URL block unable to pull information from my URL?](https://help.tryletterhead.com/links-not-working-in-browser-extension-and-url-block)
- [What is the Letterhead browser extension?](https://help.tryletterhead.com/how-to-use-the-letterhead-browser-extension)
- [How to Determine Your Tenant Prefix for the Letterhead Browser Extension](https://help.tryletterhead.com/how-to-determine-your-tenant-prefix)