DocHero
Lesson 7 +20 XP

Technical SEO: Site Speed, Mobile & Sitemaps

Behind-the-Scenes Optimization

Technical SEO ensures your website has a fast, mobile-friendly infrastructure that crawlers can easily access and index.

Core Web Vitals (Google Speed Metrics)

Google uses Core Web Vitals as official ranking signals:

  1. LCP (Largest Contentful Paint): How fast the main content loads. Ideal target: < 2.5 seconds.
  2. FID / INP (Interaction to Next Paint): How quickly the page responds to user clicks. Ideal target: < 200 ms.
  3. CLS (Cumulative Layout Shift): Measures visual stability (elements jumping around while loading). Ideal target: < 0.1.
⚠️ Warning

Mobile-First Indexing: Google evaluates the mobile version of your site first when deciding search rankings. If your site is broken on smartphones, your desktop rankings will plummet too!

Essential Technical Files

1. robots.txt

Tells crawlers which parts of your site they are allowed or forbidden to crawl:

User-agent: *
Disallow: /admin/
Disallow: /private/
Sitemap: https://dochero.com/sitemap.xml

2. sitemap.xml

An XML file listing all public URLs on your website so search engine bots can index new pages quickly.