> ## Documentation Index
> Fetch the complete documentation index at: https://docs.open-metadata.org/llms.txt
> Use this file to discover all available pages before exploring further.

# What is Tiering | OpenMetadata Data Tiering Guide

> Tier datasets based on usage, freshness, and governance to guide discovery and prioritization.

# What is Tiering

Tiering is an important concept of data classification in OpenMetadata. Data Producers and Consumers can set business importance of data by setting Tiers. `Tier 1` is the most important data of an organization.

In OpenMetadata, Tiers are System Classification tags and can be accessed from **Govern > Classification > Tier**.

<img src="https://mintcdn.com/openmetadata/7tzzR5Et0bE_K92r/public/images/how-to-guides/governance/tier1.png?fit=max&auto=format&n=7tzzR5Et0bE_K92r&q=85&s=75ac5f1727ab9049bf717bf1cd9e0aba" alt="Classification Tags: Tiers" width="2943" height="1424" data-path="public/images/how-to-guides/governance/tier1.png" />

In case of tiering, it is easiest to start with the most important (Tier 1) and the least important (Tier 5) data. Once the **Tier 1** or most important data is identified, organizations can focus on improving the descriptions and data quality. The Data Insights in OpenMetadata helps identify the unused datasets as **Tier 5**. The Tier 5 datasets can be deleted periodically to declutter. Other tiers can be added as per your organizational needs. **Tags** can be added to further mark the data assets.

| **Tier**   | **Impact**       | **Used for**                              | **Type of Impact**                  | **Usage**                      |
| ---------- | ---------------- | ----------------------------------------- | ----------------------------------- | ------------------------------ |
| **Tier 1** | High             | External & Internal Decisions             | Revenue, Regulatory, & Reputational | Highly used                    |
| **Tier 2** | Moderate         | Some External & Mostly Internal Decisions | Some Regulatory                     | Highly used                    |
| **Tier 3** | Low              | Internal Decisions                        | -                                   | Highly used (Top N percentile) |
| **Tier 4** | Low              | Internal Team Decisions                   | -                                   | -                              |
| **Tier 5** | Individual owned | Unused Datasets                           | -                                   | -                              |

## How to Add Tiers

From the **Explore** page, select a data asset and click on the edit icon for **Tier**. Select the appropriate tier. Clicking on the arrow next to the tier will provide a description of the tier.

<img src="https://mintcdn.com/openmetadata/7tzzR5Et0bE_K92r/public/images/how-to-guides/governance/tier2.png?fit=max&auto=format&n=7tzzR5Et0bE_K92r&q=85&s=d6778f48012f61b6e3c206d0e9e87dfc" alt="Add a Tier to Data Asset" width="2943" height="1424" data-path="public/images/how-to-guides/governance/tier2.png" />

<Card title="Set Up Data Insights Ingestion" href="/v1.12.x/how-to-guides/data-insights/ingestion">
  Set up the ingestion pipeline right from the UI.
</Card>