Common Crawl published an AI Visibility Audit guide:

> The guide walks through how CCBot crawls the open web and publishes the archive that helps train modern LLMs, how harmonic centrality in the Common Crawl Web Graph sets crawl priority, why CDN and WAF defaults now silently block AI crawlers and training data crawlers, and why AI still leans toward English, with the English share of the latest crawl at roughly 41 percent.

Here's the short announcement. Here's the guide.