[Q] Trying to understand what the author of an article is talking about with "p-value is 0.00, so statistically indisputable", need help

I've just read an article on how likely your content is going to be used by an LLM vs. where it sits in your page. So for instance, is your content in the top 10% more likely to be used by an LLM than the content in the bottom 10% of your page.

At one moment, the author states:

"After analyzing 1.2M verified ChatGPT citations, I found a pattern so consistent it has a P-Value of 0.0: the “ski ramp.” ChatGPT pays disproportionate attention to the top 30% of your content. Further, I found 5 clear characteristics of content that gets cited. To win in the AI era, you need to start writing like a journalist."

And then:

"18K out of 1.2M citations gives us all the insight we need. The P-Value of this analysis is 0.0, meaning it’s statistically indisputable. I split the data into batches (randomized validation splits) to demonstrate the stability of the results."

I'm trying to make sense of it, but I can't. Is he talking about p-value of a correlation? Then what's the null hypothesis? No correlation?

Here's the link: https://www.growth-memo.com/p/the-science-of-how-ai-pays-attention?ck_subscriber_id=3345662360&utm_source=convertkit&utm_medium=email&utm_campaign=%E2%9B%84%EF%B8%8F%20This%20Week%27s%20SEO%20&%20AI%20Search%20News%20with%20SEOFOMO%20%5BFeb%2022%2C%202026%5D%20-%2020804328=

If someone can help, that will be much appreciated.