As a visitor to Pinterest you click on a picture you like, which takes you to a larger version of the same picture. If you click on this picture you will go to the original website, which is where the instructions are. Each picture is called a "pin." Some pins have no instructions, they are just things people like or are for sale. If you want to save the "pins" to your own board you have to join Pinterest. You join by going to Pinterest home page and asking for an invite. You'll get an invite in your email. Then you can join and created "boards," which are groups of pictures. If you click on the "like" button that just puts it on your Facebook page. Nothing happens if you don't have a Facebook page.