---
title: Fastly VCL
summary: These articles describe Fastly VCL.
url: https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl
---

- [About Fastly VCL](https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl/about-fastly-vcl/)
- [Clustering in VCL](https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl/clustering-in-vcl/)
- [Synthetic errors in VCL](https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl/synthetic-errors-in-vcl/)
- [VCL best practices](https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl/vcl-best-practices/)
- [VCL snippets](https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl/vcl-snippets/) - These articles describe VCL snippets and how to use them.
- [Working with custom VCL](https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl/working-with-custom-vcl/)
- [Writing VCL code](https://www.fastly.com/documentation/guides/full-site-delivery/fastly-vcl/writing-vcl-code/)