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

# Concepts

> Get to know Sequence by understanding the basics

<CardGroup cols={2}>
  <Card title="Customers" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/customers.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=6321146993acad23d7c57e96a89d0797" href="/customers/create-customer" width="1431" height="805" data-path="images/illustration/customers.png">
    Create new customers via API, dashboard or via an integration. Optionally define parent-child hierarchies between customers.
  </Card>

  <Card title="Billing schedules" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/schedules.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=50d701de492f7dfd6dbda7b077bbd2a6" href="/billing/create-billing-schedules" width="1431" height="805" data-path="images/illustration/schedules.png">
    A schedule ties one or more prices to a customer over a period of time, reflecting their contract.
  </Card>

  <Card title="Products" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/products.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=334567e20606f74b81468ef802a1cb9a" href="/plans-products/product-catalogue" width="1431" height="805" data-path="images/illustration/products.png">
    Products are the specific SKUs in your business. Products are the parent
    object of prices.
  </Card>

  <Card title="Prices" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/prices.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=f8e9ac6acaf3e521711aa4e18c045886" href="/plans-products/product-catalogue" width="1431" height="805" data-path="images/illustration/prices.png">
    Prices reflect the different price-points of a product across your customers. Sequence supports a breadth of pricing models (recurring,
    usage-based, seat-based, etc).
  </Card>

  <Card title="Invoices" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/invoices.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=06065636efcd9d0ef5c019fd93903427" href="/invoicing/invoicing-customers" width="1431" height="805" data-path="images/illustration/invoices.png">
    Create one-time invoices or auto-generate invoices with billing schedules. Send invoices and credit notes via email, PDF or as a link.
  </Card>

  <Card title="Events & Metrics" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/metrics.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=70f6c3ea6953919d27fc4051f5d084d8" href="/metrics-events/overview" width="1431" height="805" data-path="images/illustration/metrics.png">
    Usage events represent units of usage you charge for. Metrics aggregate events into overall usage measure (e.g. total API calls).
  </Card>

  <Card title="Quotes" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/quotes.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=b71c3c6756276b96c1d3672d8e752e00" href="/cpq/create-quotes" width="1431" height="805" data-path="images/illustration/quotes.png">
    Quotes are pricing proposals sent to customers and can be e-signed. Accepted quotes can automatically be billed.
  </Card>

  <Card title="Integrations" img="https://mintcdn.com/sequence/mEkhIlLyJGyDgjJd/images/illustration/integrations.png?fit=max&auto=format&n=mEkhIlLyJGyDgjJd&q=85&s=620c01c0613171bee57409bb67fde7c2" href="/integrations/overview" width="1431" height="805" data-path="images/illustration/integrations.png">
    Sequence provides native CRM, ERP, data warehouse, payment, and e-signature integrations.
  </Card>
</CardGroup>