# Black Box Personalization > Opening the black box of personalization. A public site by Neil Black about how digital metrics are collected in the browser, on the network, and at the server, and how those signals can personalize a page. The public origin is https://www.blackboxpersonalization.com. Pages teach with the live mechanism. This file is a curated brief. It does not replace robots.txt or the sitemap. ## Start here - [Home](https://www.blackboxpersonalization.com/): Where a metric is read in the browser, on the network, and in the stored beacon. - [Lab](https://www.blackboxpersonalization.com/lab): Collection, understanding, and personalization, with the rule on the page. - [About](https://www.blackboxpersonalization.com/about): Neil Black. - [Notes](https://www.blackboxpersonalization.com/blog): Short essays. - [White paper](https://www.blackboxpersonalization.com/white-paper): How the site was built. ## Measurement - [AI referrals](https://www.blackboxpersonalization.com/lab/ai-referrals): How this site classifies AI referrers and crawler user agents. - [llms.txt](https://www.blackboxpersonalization.com/lab/llms-txt): What this file is, and how it differs from robots.txt and the sitemap. - [SEO](https://www.blackboxpersonalization.com/lab/seo): What a crawler reads in the HTML. - [Sitemap](https://www.blackboxpersonalization.com/sitemap.xml): The full public URL list.