> For the complete documentation index, see [llms.txt](https://sunbird.gitbook.io/sunbird-spark/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sunbird.gitbook.io/sunbird-spark/learn/components/content-discovery.md).

# Content discovery

### Digital discovery

Learners can discover content through:

* **Full-text search** powered by OpenSearch, across titles, descriptions, and content metadata
* **Faceted filters** across framework dimensions such as subject, grade level, medium, and content type
* **Curated sections** on the home page and explore page, such as Most Popular, Trending, Recently Added, and Recommended
* **Personalised recommendations** on the home dashboard for logged-in learners, based on learning history

Filter dimensions are fully configurable and can match your taxonomy.

### Phygital discovery

{% hint style="info" %}
**Add-on required:** DIAL and QR code functionality is an optional Spark add-on. It is disabled by default. See [Getting Started › Enabling Add-ons](/sunbird-spark/use/getting-started/enabling-add-ons.md).
{% endhint %}

When the DIAL add-on is enabled, physical learning materials such as textbooks, posters, and handouts can link to digital content through QR codes. A learner scans the QR code with the Spark mobile app and goes directly to the linked digital resource.

This is the Sunbird capability used by DIKSHA to link physical textbooks to digital counterparts.


---

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