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

# Overview

## Understand the foundations of Primer

Learn how payments flow through Primer and explore the key concepts that power our platform.

![Understand the foundations of Primer](https://goat-assets.production.core.primer.io/marketing/external-docs/overview-pages/concepts/banner/light.png)

## Learn about Primer

> [card] [Primer Payment](https://primer.io/docs/concepts/primer-payment.md)
>
> Learn about Primer's payment model and creation process

> [card] [Payment Lifecycle](https://primer.io/docs/concepts/payment-lifecycle.md)
>
> Understand how payments flow through the Primer system

> [card] [Currencies](https://primer.io/docs/concepts/currencies.md)
>
> Learn about currency handling in Primer

> [card] [Payment Timeline](https://primer.io/docs/concepts/payment-timeline.md)
>
> Track the chronological events in a payment's lifecycle

> [card] [Payment Method Token](https://primer.io/docs/concepts/payment-method-token.md)
>
> Understand how payment methods are tokenized and stored

> [card] [Decline Codes](https://primer.io/docs/concepts/decline-codes/overview.md)
>
> Explore payment decline reasons and timeout scenarios

> [card] [Metrics](https://primer.io/docs/concepts/metrics.md)
>
> Understand key payment metrics and analytics

> [card] [Filters & Dimensions](https://primer.io/docs/concepts/filters-and-dimensions.md)
>
> Learn how to analyze and segment your payment data


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