docs: Describe the purpose of this repo in README

README.md

@@ -2,6 +2,11 @@
 
 [![.github/workflows/dynamic-template.yml](https://github.com/f-hollow/demo-action-dynamic-readme/actions/workflows/dynamic-template.yml/badge.svg)](https://github.com/f-hollow/demo-action-dynamic-readme/actions/workflows/dynamic-template.yml)
 
+This repo contains some workflows to update README.
+
+- `update-readme.yml` appends data from a file to README and commits it. This is a very simple workflow created as a proof of concept. It needs many improvements to be useful, such as replacing actual markers instead of appending the same data over and over.
+- `.github/workflows/dynamic-template.yml` is a third-party solution called [Dynamic Readme](https://github.com/marketplace/actions/dynamic-readme) to make READMEs "dynamic". It works but it seems like the project is not actively maintained. The table below is replaced with a new one from `templates/tables/table.md` on every push.
+
 <!-- START ./tables/table.md -->
 | One | Two | Three |
 | --- | --- | --- |