Technical SEO: Speed, Mobile, Sitemaps
Technical SEO makes sure Google can easily reach, read and trust your site — fast and on phones.
What you will learn
- Explain why speed and mobile-friendliness matter
- Describe what a sitemap and robots.txt do
- Spot common technical problems
What technical SEO covers
Technical SEO is the behind-the-scenes work that helps Google crawl and read your site smoothly. You do not need to be a programmer to understand the main pieces.
Speed and mobile come first
Most people in India search on a phone, often on mobile data. If your page is slow or breaks on a small screen, visitors leave and Google notices. Two must-haves:
- Fast loading — compress big images, and avoid heavy, cluttered pages.
- Mobile-friendly — text readable without zooming, buttons easy to tap.
Why a slow page quietly loses customers
Speed is not just nice to have — it directly costs sales. The longer a page takes to appear, the more people give up before it loads (that giving-up is called the bounce rate). Roughly:
| Page load time | Visitors who leave before it loads | Effect |
|---|---|---|
| 1 second | Very few | Smooth — most people stay |
| 3 seconds | About 1 in 3 | Noticeable drop-off |
| 5 seconds | About 1 in 2 | Half your traffic wasted |
| 7+ seconds | Most visitors | Page is effectively broken |
Note: Imagine 1,000 people click your bakery from Google. At a 1-second load you keep almost all of them; at 5 seconds you lose about 500 before they see a single cake. You paid (in SEO effort or ads) to get those clicks — a slow page throws half of them away. Faster pages also tend to rank higher, so speed helps you twice.
You can test any page free with Google’s PageSpeed Insights and Mobile-Friendly Test tools — they tell you exactly what to fix.
The sitemap
A sitemap is a file that lists all the important pages on your site, like a contents page in a book. It helps Google find every page, especially new ones. It usually lives at one address:
sweetcrumbs.in/sitemap.xmlNote: This file lists your pages so Google can find them all in one place. Most website builders (like WordPress) create and update a sitemap for you automatically.
robots.txt
A robots.txt file tells crawlers which parts of your site they may or may not visit. It is useful for hiding things like an admin area from search engines.
User-agent: *
Disallow: /admin/
Allow: /Note: User-agent: * means all crawlers. Disallow: /admin/ tells them to skip the admin folder. Allow: / lets them crawl everything else. Be very careful — a wrong rule here can hide your whole site.
Watch out: A common disaster: a line that reads Disallow: / on its own blocks your entire site from Google. Always double-check robots.txt before going live.
Tip: Quick technical checklist: site loads in a few seconds, works on a phone, has a sitemap, and uses HTTPS (HyperText Transfer Protocol Secure — the padlock icon that means the connection is encrypted). These basics fix most issues.
Q. What is the main job of a sitemap?
✍️ Practice
- Test any website with Google PageSpeed Insights and note its biggest issue.
- Explain in one sentence what robots.txt does.
🏠 Homework
- Check a website on a phone. List 2 things that make it easy or hard to use on mobile.