Update documentation

Author: jsattler

docs/README.md

@@ -4,4 +4,13 @@
 > Founded by the Commerzbank in 1994, the company went public in 2000. The Commerzbank integrated the company on November 1, 2020.
 
 ## What is `comdirect-golang`?
-`comdirect-golang` is a client written in golang to interact with the comdirect REST API.
+`comdirect-golang` is a client written in golang to interact with the comdirect REST API.
+You can use the package to implement various use cases for example:
+* A CLI tool to interact with comdirect
+* A prometheus exporter to monitor your account balance or depots
+* A tool to automatically fetch your comdirect reports and documents
+* A tool that triggers sell/buy requests in certain events
+
+There are more use cases that you can implement using the package.
+
+## Examples