From the previous note we learned about the concept of SEO. We also know what a search index is and how it is updated using search robots.
In an ideal world, a search robot should load a page, analyze its content, and create a list of keywords that best correspond to the content. (By the way, just in case, keywords - these are, roughly speaking, search phrases, I hope there are no questions about this. =)) But we understand that it is not possible. In order to do this, a search robot must have human thinking, a semblance of intelligence. (Although, despite everything, robots are very smart, so don't underestimate them, but more on that later).