If you got scared by the previous paragraph, you can sigh with relief now. Everything is up to the agreement you make. Maybe you come up with a new technique incorporating the technique you learnt on a course, or a new project with this technique and you would like to teach it. Or maybe you bought a tutorial and you can teach children in the kindergarden how to make funny broches. All of these are good reasons to ask the author for permission. You may not reach any agreement but at least you know where you stand. You will probably come to some kind of compromise, e. g. promotion, comission, and the manner of presentation. Just ask. And please respect the author’s answer, whether it is positive or negative.
An example situation may look like this:
“Hello, I bought your Attack Ewe tutorial and I would like to teach children at a children’s camp how to make the sheep. I would like to ask if it is possible.
Hello, Thank you for your message. I’m happy you got in touch. If you are going to teach the sheep to children, you have my permission to do that. It would be great if you could take some pictures and let me know if the kids liked it. Thank you and let me know if you have any other questions.”