What is index.html?
It is the default doorway file. When someone visits a domain or folder, the server often looks for index.html first.
XWeb101 • HTML • Search • AI
Learn the web at the root layer.
XWeb101 is a simple guide for people who want to understand how the modern web still works underneath the noise: domain, hosting, folder, index.html, links, search, and AI-readable pages.
Quick Answer
The web is still built from simple parts. A domain points to hosting. Hosting contains folders. A folder can contain an index.html file. That file can become a live page humans, search engines, and AI systems can read.
domain → hosting → folder → index.html → live page
Why does it matter now?
AI systems and search engines still depend on clear pages, links, headings, answers, and structure. Simple HTML can still speak clearly.
What can b build?
Answer pages, learning pages, small tools, link hubs, proof pages, semantic maps, and lightweight web apps.
The XWeb101 Principle
You do not need to begin with a complicated platform. You can begin with one readable file in the right folder. From there, the web becomes less mysterious.
Lesson 1
How a domain finds a folder.
Lesson 2
Why index.html becomes the homepage.
Lesson 3
How to make a page readable by humans, Google, and AI.
Explore the Rooms
XWeb101 is organized into simple rooms. Each room explores one concept about the web, search, AI, HTML, and discoverability.
Home → Room → Lesson → Related Room
- AI Search — How AI systems discover, retrieve, and organize information.