# Overview (/docs)



## Essentials [#essentials]

The core concepts you’ll use in almost every setup: how captions are created, how
languages work, and how you deliver them to viewers.

  - [Getting started](/docs/getting-started): Create an account, set up your organisation, and learn the basics.

  - [Captioning methods](/docs/methods): Human, ASR, and playback — when to use each and what to expect.

  - [Languages](/docs/languages): How language channels work (and how to add translations).

  - [Destinations](/docs/destinations): Where captions go: browser, overlay, streaming, and text destinations.

  

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## Advanced [#advanced]

Deep dives for production workflows, integrations, and teams that want more
control.

  - [AV feeds](/docs/feeds): Understand audio/video inputs and how they affect caption quality.

  - [AI services](/docs/ai-services): Add translations, proofreading, and other assistive capabilities.

  - [Project management](/docs/project-management): Monitor live events, coordinate with the team, and review assets after.

  - [API](/docs/api): Programmatic integrations for caption production and retrieval.

  - [Line 21 app](/docs/line-21-app): Operational how‑tos for running a live event in the web app.

  - [Security & data](/docs/security/data-handling): Data retention, AI training, third-party processors, and client options.

  - [FAQs](/docs/faqs): Quick answers to the questions we hear most often.

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  For any questions, feedback, or support, [please contact us
  here](https://line-21.com/contact).