Update README.md

Author: C-Nedelcu

README.md

@@ -1,2 +1,16 @@
 # page-title-change-detector
-A tiny Windows utility program that downloads a web page's source code at a regular interval and alerts you when the title changes
+A tiny Windows utility program written in C# that downloads a web page's source code at a regular interval and alerts you when the title changes
+
+This program offers one simple functionality:
+* Select an interval (in seconds)
+* Enter the URL of a web page
+* Press 'Start'
+
+When you press 'Start', the program will retrieve the page title once and set it as 'Initial page title'.
+Then it will redownload the same page regularly at the specified interval.
+If a change is detected, the program stops checking, emits a sound, and displays an alert message box.
+
+Requirements:
+* Microsoft Windows
+* .NET Framework 4.5.1+
+* Internet connection