Schema (structured data) helps search engines better understand your site's content and show extra information in the results.

{
  "@context": "https://schema.org",
  "@type": "WebSite",
  "name": "Your Site",
  "url": "https://yoursite.com"
}

robots.txt tells search engines which areas of the site can be crawled and where to find the page map.

User-agent: *
Allow: /

Sitemap: https://yoursite.com/sitemap.xml

Canonical tags prevent duplicate content by telling search engines which version of each page is the main one.

<link rel="canonical"
  href="https://yoursite.com/" />

Meta tags set the title and description that appear on Google — your audience's first contact with your site.

<title>Your Site</title>
<meta name="description"
  content="What you do." />

sitemap.xml lists every page on the site, making crawling and indexing easier for search engines.

<urlset>
  <url>
    <loc>https://yoursite.com/</loc>
  </url>
</urlset>

The index.html file is your site's main page. It structures the content and starts your presence on the web.

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Your Site</title>
  </head>
  <body>...</body>
</html>