Add about section to readme

README.md

@@ -1,6 +1,13 @@
 # my-name-is-url [![Build Status](https://travis-ci.org/lukechilds/my-name-is-url.svg?branch=master)](https://travis-ci.org/lukechilds/my-name-is-url)
 Intelligently finds many different url formats in a string. Works in browser and node.
 
+## About
+In a nutshell, `my-name-is-url` is an Intelligent parser that searches a string of text for urls. The url spec is so vague that almost anything _could_ be a url. The regular expression used in `my-name-is-url` tries to match patterns likely to represent a url in a sentence rather than matching the actual url spec.
+
+> ❗️**Important note**
+>
+> If you're trying to parse a url into sections (scheme,host) or check a url is valid this module isn't for you. This module is intended to search text for urls.
+
 ## Install
 ```shell
 $ npm install --save my-name-is-url