> For the complete documentation index, see [llms.txt](https://docs.crew.you/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.crew.you/signals/overview.md).

# What are Signals?

Signals are AI-curated intelligence feeds that deliver the latest news and insights on any topic you care about. Think of them as your personal newsletter — except the AI does all the research, scoring, and summarizing for you.

## How It Works

1. **Browse or create** a signal on a topic you care about (AI research, startup funding, tech trends, etc.)
2. **Subscribe** and choose how you want to receive updates — in the feed, by email, or through your favorite messenger
3. **Read** concise, AI-written articles with source links, quality scores, and translations in your language

Crew's AI searches the web, evaluates sources, and synthesizes the best content into easy-to-read articles — on a schedule you choose (daily, weekly, biweekly, or monthly).

## Browsing Signals

Go to **Signals** in the sidebar (or press **S**) to open the main feed.

### Feed

The main feed shows the latest articles from all published signals. Scroll through to discover new topics, or use the search bar to find something specific.

### Browse by Category

Click **Browse** in the top navigation to explore signals organized by category:

* **AI & Tech** — Artificial intelligence, machine learning, developer tools
* **Finance** — Markets, fintech, cryptocurrency, investing
* **Science** — Research breakthroughs, academic papers, discoveries
* **Culture** — Entertainment, media, lifestyle, trends
* **Business** — Startups, strategy, management, industry analysis
* **Open Source** — Popular repositories, community projects, new releases
* **Regional** — News and trends specific to your region
* **Health** — Medical research, wellness, healthcare innovation
* **Education** — Learning resources, edtech, academic trends
* **Sports** — Games, leagues, athlete news, match highlights
* **Food** — Recipes, restaurant trends, food industry news
* **Automotive** — Cars, EVs, motor shows, industry updates
* **Hobbies** — Gaming, crafts, outdoor activities, collecting
* **Psychology** — Research, mental health, behavioral insights
* **History** — Historical events, archaeology, archival discoveries

…and more. New categories are added regularly.

Each signal card shows the title, description, subscriber count, update frequency, and whether it's an official Crew signal.

### Official Signals

Crew maintains 220+ built-in signals across all categories — covering everything from AI research papers to sports highlights. Browse the catalog to find signals that match your interests.

## Subscribing to a Signal

1. Find a signal you like in the browse page or feed
2. Click the **Subscribe** button
3. Choose your delivery method:
   * **Web** — Read articles in the Signals feed
   * **Email** — Get a digest delivered to your inbox
   * **Messenger** — Receive notifications on Telegram, Slack, Discord, LINE, WhatsApp, or Microsoft Teams

You can change your delivery settings anytime from the **My Subscriptions** page.

## Reading Articles

Click any article in the feed to read the full version. Each article includes:

* A concise AI-written summary
* Links to original sources
* Quality score (how relevant and well-sourced the content is)
* Reading time estimate
* Translations available in all 14 supported languages

## My Subscriptions

Click **My Subscriptions** in the Signals navigation to manage all your subscriptions. Here you can:

* See which signals you follow
* Change delivery method (web, email, or messenger)
* Unsubscribe from signals you no longer need

## Tips

* **Start with official signals** — They're a great way to see what Signals can do
* **Try different delivery methods** — Get AI research on the web but breaking news via Telegram
* **Use the search** — The feed search finds articles by title, summary, or signal name
* **Create your own** — Can't find what you're looking for? [Create a custom signal](/signals/creating-signals.md)