Update README.md

README.md

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 Jot
 =======
 
-A simple note-taking and sharing app.
+A server-less pastebin-esque note-taking app.
 
+**Demo**: https://alfg.github.com/jot
+
+### Features
 * A simple, elegant design
-* Data is base64 encoded into the URL hash, so no data is stored.
+* Retains formatting of messages
+* Data is base64 encoded into the URL hash, so no data is stored on a server
 * Easy to share via encoded URL
 * Simple to deploy. Just a few static files.
-* Encryption support via Blowfish
+* Add a secret key with encryption support via Blowfish
 
-**Demo**: https://alfg.github.com/jot
+### Notes
+* Most modern browsers limit the URL to 2000 characters. Messages can easily generate a long URL depending
+on the content. So it is best to keep messages minimal (TODO lists, short snippets of code, etc...).
+* Use a URL shortening service to shorten the URL when sharing. Jot URLs can typically be very long
+depending on the content.
+
+### Examples
+https://alfg.co/jot/#eTWF5IHRoZSBzb3VyY2UgYmUgd2l0aCB5b3Uu
+https://alfg.co/jot/#eVGhlIGtleSB0byBoYXBwaW5lc3M6CgoqIEVhdAoqIFNsZWVwCiogQ29kZQ==
+https://alfg.co/jot/#bB2011105CADDE78137C738395E17FCDCFED77C945C3B7EA3 (key is foobar)