> ## Documentation Index
> Fetch the complete documentation index at: https://docs.concretehq.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Advanced Crawling

> How Concrete extracts and indexes content from links within your portfolio communications

## Overview

Advanced crawling automatically extracts content from important links within your portfolio emails, ensuring that critical information isn't lost behind external platforms.

<Tip>
  Advanced crawling can be enabled or disabled per email connection in your **Settings** → **Email Accounts**.
</Tip>

***

## Supported Integrations

### DocSend

When enabled, Concrete indexes DocSend content using the inbox's email address.

**How it works:**

* Detects DocSend links within portfolio emails
* Uses the recipient's email address to access permitted content
* Indexes the full document content for search and AI analysis

**Limitations:**

* Will not attempt to enter passcodes or complete email verification flows
* Only accesses content that the inbox has permission to view
* Cannot bypass additional authentication requirements
* Refuses to index content unless deemed intended for the inbox owner

<Tip>
  DocSend indexing can be toggled on or off individually for each email connection in **Settings** → **Email Accounts**.
</Tip>

### Loom

Concrete extracts publicly available Loom videos shared in emails.

**How it works:**

* Identifies Loom video links in emails
* Downloads and indexes publicly accessible videos and their transcripts

**Limitations:**

* Will not authenticate into Loom accounts
* Will not access password-protected or private videos

### Google Docs

Concrete downloads and indexes content from Google Workspace files shared via link.

**Supported file types:**

* Google Docs (text documents)
* Google Sheets (spreadsheets)
* Google Drive files (various formats)

**Limitations:**

* Only accesses files set to "anyone with the link" sharing
* File owner must allow downloading
* Cannot access files requiring sign-in or additional permissions

### All Other Links

For websites and platforms not covered by dedicated integrations, Concrete uses screenshots to capture content.

**How it works:**

* Takes high-resolution screenshot of linked page
* Extracts content from image if deemed useful

**Best for:**

* News articles and blog posts
* Company websites and landing pages

***

## Managing Crawling Settings

1. Go to **Settings** → **Email Accounts**
2. Select your inbox connection
3. Tune your preferences using the toggles in the **follow links** section.