Embeddings have a special place in my heart since I learned about them 2 years ago. Working in SEO, it felt like everything finally "clicked" and I understood, on a lower level, how Google search actually works, how they're able to show specific content snippets directly on the search results page, etc. I never found any "SEO Guru" discussing this at all back then (maybe even now?), even though this was complete gold. It explains "topical authority" and gave you clues on how Google itself understands it.