What does this mean

I am following a book for a class and it said to look up the messages of a sign. This instruction makes zero sense to me. I feel like I don’t really need to do this, but I would like to know what it is talking about. Help.

I guess the problem is the book itself, or maybe my comprehension of the book. I worked past this part and I tried to delete this post but the forum wouldn’t let me. Thanks for those who tried to help.

I literally read every word of that page 3 times and I cannot see where it says that.

I read through it and it doesn’t say anything about looking up the message of a sign. Can you please explain which part you’re having trouble with?