Who explains "what is SEO?" briefly?

[OGMoonbear]

If you were asked to explain SEO in a single sentence, how would you describe it? Here's my summary: "SEO involves optimizing to reach the top page of search results and attract maximum visitors through SSL certified, fast and mobile-friendly website, professionally crafted metatags and H tags, usage of long-tail keywords within 3%, 100% unique content, and quality link building without spamming." Share your thoughts. Let's see what the best SEO definition in the shortest sentence could be.