If the URL contains a "www", like www.stormboard.com, you can type the website directly in the the sticky note and Stormboard will automatically convert the text to a link. If it does not change into a link automatically, you may need to include "https://" at the beginning of the link.
You can also copy and paste any URLs directly into a sticky note.
Once you create the sticky, a thumbnail containing a preview of the link will automatically be shown in the sticky.
To open the link, simply click on the bottom of the sticky or click on the sticky and then on open source.