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

# Overview

Once you have onboarded one of your customers to Layer by creating a [Business](/api-reference/business/business), you can start importing their banking data into Layer.

**Bank Transactions**, activity within your customers' business bank accounts and credit cards, can be ingested by Layer in two ways:

* From external financial institutions: Layer's [Plaid integration](/guides/importing-bank-transactions-plaid)
* From your platform's embedded bank accounts and credit cards: [Unit or Stripe Treasury](/guides/importing-bank-transactions-direct)

For a complete accounting picture, you will also need to import your customers' [revenue data](/guides/importing-revenue-data-overview).

**Payroll** and **Bills** are additional types of financial activity supported by Layer (currently in Beta). Reach out to your Layer contact for access.