diff --git a/README.md b/README.md
index ad5a2dd..d4f2712 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,13 @@
 # vKVM Shared Memory
 
+Shared memory is a kernel-managed memory area that can be read and written by the graphical user interface , Text Renderer and the Library.
+
+## Features
+
+- set shared memory keys
+- Manage the shared memory
+
+
 ## Installation
 
 Use the installation script provided in the Scripts repository
@@ -7,3 +15,17 @@ to install the full package.
 
 Installing a single component is currently not supported.
 
+## Usage 
+
+mkdir build
+cd build
+cmake ..
+make
+
+## Description
+
+changedKey(): create new Key for the Shared Memory.
+getAnswerFromUser(): ask the User if he want to chgange the Key of Shared Memory.
+initSharedMemory(): create Shared Memory and make it available t o use it 
+deleteSharedMemory(int s): delete the Shared memory. 
+deleteSharedMemory(): delete the Shared memory.