### Assembly Guide

Learn how to get started with Assembly.

#### Most popular

Learn about Assembly’s most essential features.

- [Key concepts ](/content/guide/key-concepts/index.html)  
   Get familiar with key terms and concepts  
- [Customization and setup ](/content/guide/customization-and-setup/index.html)  
   Customize your setup to get the most out of Assembly  
- [Intro to apps ](/content/guide/intro-to-apps/index.html)  
   Learn about the types of apps you can set up  
- [Bulk Import ](/content/guide/bulk-import/index.html)  
   Import many clients or companies in one step  
- [Custom domains ](/content/guide/custom-domains/index.html)  
   White-label your portal with a custom domain and send out branded client email notifications with a custom email domain  
- [Recommended workflows ](/content/guide/recommended-workflows/index.html)  
   Most popular automations

#### App guides

Learn how to configure the most popular apps.

- [Messages App ](/content/guide/assembly-messages-app/index.html)  
   The Messages App lets you and your clients securely and seamlessly communicate.  
- [Payments App ](/content/guide/assembly-payments-app/index.html)  
   The Payments App helps you manage client billing, invoicing, services, store, and payment links.  
- [Contracts App ](/content/guide/assembly-contracts-app/index.html)  
   Prepare, sign, send, and manage all your eSignature contracts in one place.  
- [Airtable Embed ](/content/guide/airtable-partner-app/index.html)  
   Connect the Airtable Embed  
- [Calendly Embed ](/content/guide/calendly-partner-app/index.html)  
   Connect the Calendly Embed  
- [Google Sheets Embed ](/content/guide/google-sheets-partner-app/index.html)  
   Connect the Google Sheets Embed