Update readme

README.md

@@ -6,6 +6,18 @@ Note:
 - The Python extension offers the python debugger extension as an optional installation, including it during the setup process.
 - This extension is supported for all [actively supported versions](https://devguide.python.org/#status-of-python-branches) of the Python language (i.e., Python >= 3.7).
 
+
+## Purpose
+
+The main intent of this extension is to offer:
+
+1. **Independence and Compatibility:** The Python Debugger extension aims to separate the debugging functionality from the main Python extension to prevent compatibility issues. This ensures that even as the Python extension drops support for older Python versions (e.g., Python 3.7), you can continue debugging projects with those versions without downgrading your Python extension. This allows you to access new features and bug fixes while keeping your debugging capabilities intact.
+
+2. **Platform-Specific Builds:** Unlike the main Python extension, which bundles all debugpy builds for various platforms into a single extension package, the Python Debugger extension provides a more streamlined approach: it delivers platform-specific builds, ensuring you only receive the components relevant to your specific operating system. This reduces download times and unnecessary overhead.
+
+3. **Feature Parity and Ongoing Updates:** This extension replicates all the functionality available in the main Python extension, and more. Going forward, any new debugger features will be added to this extension. In the future, the Python extension will no longer offer debugging support on its own, and we will transition all debugging support to this extension for all debugging functionality.
+
+
 ## Usage
 
 Once installed in Visual Studio Code, python-debugger will be automatically activated when you open a Python file.