Read the Rules

Hi! I'm no stranger to help forums. I feel like I have a fairly good knowledge how W10 works, but I'm learning new things every day. I want to be a good member here and follow the rules. I like to attach links some times to my replies that I have found while searching the web. I don't want to plagiarize or attach any thing that might cause the forum any grief. I have tried to attach a link on my reply, but I get pop-up telling me I'm not allowed. Is that because I'm a new member or are these links against the rules. I really like the tutorials by Shawn Brinks.
Can they be attached to threads here on the forum?
Thank you!