# Hydrogen SDK reference

Find everything you need to use our Shopify Hydrogen SDK.

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Use the summary below to quickly jump to a specific topic:

- [Integration](/reference/sdk/hydrogen/integration): Learn how to integrate Croct into your Shopify Hydrogen project.
- [Manual installation](/reference/sdk/hydrogen/manual-installation): Learn the steps to manually integrate Croct into your Shopify Hydrogen project.
- [Content rendering](/reference/sdk/hydrogen/content-rendering): Learn how to fetch and render content for your slots.
- [Query evaluation](/reference/sdk/hydrogen/query-evaluation): Learn how to evaluate CQL queries to personalize and segment your storefront.
- [Data collection](/reference/sdk/hydrogen/data-collection): Learn how to collect information for personalization.
- [Event tracking](/reference/sdk/hydrogen/event-tracking): Learn how Croct collects storefront analytics and respects visitor consent.
- [Testing](/reference/sdk/hydrogen/testing): Learn how to write automated tests for your integration.
- [Troubleshooting](/reference/sdk/hydrogen/troubleshooting): Find solutions to common integration issues.
- [Hydrogen SDK API reference](/reference/sdk/hydrogen/api): Explore the API provided by the Shopify Hydrogen SDK.