Update README.md to enhance clarity and detail on GitHub Copilot features and usage

Author: scubaninja

Getting-Started-with-GitHub-Copilot/README.md

@@ -8,14 +8,15 @@ Now enhanced with Agent Mode, GitHub Copilot is more than a coding assistant—i
 
 By the end of this module, you'll confidently articulate the role and impact of GitHub Copilot in modern development environments. You'll also gain practical experience using it within VS Code and understand its place in the evolving landscape of AI-powered software engineering.
 
-Note: Although this module uses [Codespaces](https://github.com/codespaces), you can use GitHub Copilot in a variety of other environments, including locally with Visual Studio Code.
+Note: Although this module uses [GitHub Codespaces](https://github.com/codespaces), you can use GitHub Copilot in a variety of other environments, including locally with Visual Studio Code.
 </header>
 
 
 - **Who is this for**: Developers at any experience level looking to accelerate their code workflow.
-- **What you'll learn**: The different ways to interact with Copilot to explain, write, debug, and develop code.
+- **What you'll learn**: How to setup Copilot, core features, and practical usage of GitHub Copilot—including Copilot Chat, Agentic Mode, and AI-powered debugging.
 - **What you'll build**: You will guide Copilot to update Mergington High School's extracurricular activities website.
 - **Prerequisites**:
+  - Sign up for a [GitHub account](https://github.com/) (or bring your existing account).  
   - GitHub Copilot is available to use for free, sign up for [GitHub Copilot](https://gh.io/copilot).
   - Skills exercise: [Introduction to GitHub](https://github.com/skills/introduction-to-github)
   - Familiarity with [VS Code](https://code.visualstudio.com/)
@@ -25,15 +26,16 @@ Note: Although this module uses [Codespaces](https://github.com/codespaces), you
 
 By the end of this module, you'll be able to:
 
-1. Use a preconfigured Codespace to run VS Code in your browser.
-1. Learn different interaction options to develop with GitHub Copilot.
-1. Use Copilot to summarize and review your pull request.
+1. Use a preconfigured Codespace to run VS Code securely in your browser.
+2. Learn different interaction options to develop with GitHub Copilot.
+3. Use Copilot to summarize and review your pull request.
 
 
 ## Prerequisite reading:
-- Accelerate app development by using GitHub Copilot: (https://learn.microsoft.com/en-us/training/paths/accelerate-app-development-using-github-copilot/)
-- Ask, Edit, and Agent - In-depth Overview of GitHub Copilot Chat Modes: 
-  [![Ask, Edit, and Agent - In-depth Overview of GitHub Copilot Chat Modes](https://img.youtube.com/vi/s7Qzq0ejhjg/0.jpg)](https://learn.microsoft.com/en-us/shows/visual-studio-code/ask-edit-and-agent-in-depth-overview-of-github-copilot-chat-modes)
+- [Accelerate app development by using GitHub Copilot](https://learn.microsoft.com/training/paths/accelerate-app-development-using-github-copilot/)
+- Ask, Edit, and Agent Modes: [learn more here!](https://learn.microsoft.com/shows/visual-studio-code/ask-edit-and-agent-in-depth-overview-of-github-copilot-chat-modes)
+- In-depth Overview of GitHub Copilot Chat Modes: 
+  [![Ask, Edit, and Agent - In-depth Overview of GitHub Copilot Chat Modes](https://img.youtube.com/vi/s7Qzq0ejhjg/0.jpg)]
 
 ### How to start this course
 
@@ -61,3 +63,4 @@ If the exercise isn't ready in 20 seconds, please check the [Actions](../../acti
 ---
 
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+