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Updated override list information in Topics article #7824

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4 changes: 2 additions & 2 deletions site/en/docs/privacy-sandbox/topics/overview/index.md
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Expand Up @@ -6,7 +6,7 @@ subhead: >
description: >
The Topics API enables interest-based advertising (IBA) without having to resort to tracking the sites a user visits.
date: 2022-01-25
updated: 2023-08-29
updated: 2023-11-20
authors:
- samdutton
---
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To avoid sensitive categories, topics must be public, human-curated, and remain up to date. The initial taxonomy proposed for testing by Chrome has been human-curated [to exclude categories generally considered sensitive](https://github.com/patcg-individual-drafts/topics#meeting-the-privacy-goals:~:text=of%20a%20page.-,The,-topics%20revealed%20by), such as ethnicity or sexual orientation.

For 10,000 top sites, the Topics API implementation in Chrome uses a manually curated, publicly available [override list](/docs/privacy-sandbox/topics/topic-classification/#classifier-model) to map hostnames to topics. For other sites, the Topics API uses a [machine learning](https://royalsociety.org/topics-policy/projects/machine-learning/what-is-machine-learning-infographic/) model to infer topics from hostnames.
For around 50,000 top sites, the Topics API implementation in Chrome uses a manually curated, publicly available [override list](/docs/privacy-sandbox/topics/topic-classification/#classifier-model) to map hostnames to topics. For other sites, the Topics API uses a [machine learning](https://royalsociety.org/topics-policy/projects/machine-learning/what-is-machine-learning-infographic/) model to infer topics from hostnames.

Chrome's implementation of the Topics API downloads a [TensorFlow Lite](https://www.tensorflow.org/lite/guide) file representing the model so it can be used locally on the user's device.

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