---
title: "Accessibility: What It Is and Why It Matters"
url: "https://nitsantech.de/en/accessibility-glossary/accessibility"
description: Discover what digital accessibility means, why it’s crucial, and how to make your website inclusive and usable for all users.
date: 2025-08-01
modified: 2025-09-25
lastUpdated: 2026-02-25
---

# Accessibility: What It Is and Why It Matters

[ Accessibility Glossary ](https://nitsantech.de/en/accessibility-glossary)Accessibility
=============

 [

  A11Y  ](https://nitsantech.de/en/accessibility-glossary/a11y) [

  Accessibility Audit  ](https://nitsantech.de/en/accessibility-glossary/accessibility-audit)

  <a id="c20441"></a>**Accessibility** describes the design of digital and physical environments in such a way that they can be used by **all people**, regardless of impairments.

The aim is to give people with disabilities **equal access** to information, services and social life.

**Where Accessibility Applies**

- **Digital offerings:** Websites, apps, software
- **Building structures:** Public space, signage, transportation services
- **Communication:** Easy-to-understand language, subtitles, alternative formats

**Key Principles of Accessibility**

Accessibility follows four basic requirements:

- Content must be**perceptible** be
- Operation must be**possible** even without a mouse
- Information should be**understandable** be
- Systems must be**robust** work

**Why It Matters,**

It promotes participation, self-determination, and equality. It also benefits older people, children, and people in temporary situations (e.g. with a broken arm). By focusing on [**TYPO3 Accessibility**](https://nitsantech.de/en/blog/typo3-accessibility), websites can become more inclusive for everyone. [**TYPO3 Accessibility Checker**](https://nitsantech.de/en/blog/typo3-accessibility-checker) makes it easy to find and fix any issues, ensuring a better experience for all users.