Update README.md

Author: hamdivazim-archive

README.md

@@ -6,3 +6,6 @@ Install with pip in your terminal, making sure Python is added to PATH:
 ```
 $ pip install usefulib
 ```
+
+## What can it do?
+usefulib is open-source and can be contributed to by anyone. Therefore, it offers a lot of simple functions to make writing code easier and quicker. A complete list of all fuctions usefulib provides can be found [here](https://github.com/hamdivazim/usefulib/blob/main/ALLFUNCTIONS.md).