> For the complete documentation index, see [llms.txt](https://help.lunaloyaltycards.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.lunaloyaltycards.com/quick-start/quickstart-1.md).

# Understand All The Features (15 Mins)

Beautiful documentation starts with the content you create — and GitBook makes it easy to get started with any pre-existing content.

{% embed url="<https://drive.google.com/file/d/1R-qxMkEcDtHcejpAe36dLogX1ga3vw8G/view?usp=sharing>" %}

{% hint style="info" %}
Want to learn about writing content from scratch? Head to the [Basics](https://github.com/GitbookIO/onboarding-template/blob/main/getting-started/broken-reference/README.md) section to learn more.
{% endhint %}

### Import

GitBook supports importing content from many popular writing tools and formats. If your content already exists, you can upload a file or group of files to be imported.

### Sync a repository

GitBook also allows you to set up a bi-directional sync with an existing repository on GitHub or GitLab. Setting up Git Sync allows you and your team to write content in GitBook or in code, and never have to worry about your content becoming out of sync.