Rosied999,
Raw url is the web address posted as is instead of making it into a link.
When posting, click on reply instead of using the Quik Reply box. Then click on the paper clip at the top of that Post box. Enter the url in the pop-up box. It is very easy.
HOWEVER, with the new security measures, I'm not sure you will be able to post a link until you have made more posts. I see that you are a 'newbie.'