diff --git a/README.md b/README.md
index fb6b8f2..25f1d8e 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@ PHP Compatibility Github Action
 
 This Github Action runs PHPCompatibility/PHPCompatibility on your source code in an easy way.
 
+PHPCompatibility is a set of sniffs for PHP CodeSniffer that checks for PHP cross-version compatibility. It will allow you to analyse your code for compatibility with higher and lower versions of PHP. This way you can confidently make changes to your code and make sure you don't break backwards compatibility on it.
+
 ## Inputs
 
 ### skip-php-setup