Your sister asked you why more firms don't advertise by providing useful information and training in a manner similar to the way Williams Sonoma does with its recipes and its technique videos (https://www.williams-sonoma.com/recipe/ and https://www.youtube.com/user/WilliamsSonoma). Is this a concept that could be useful? If not, explain why. If so, explain what kinds of business would benefit from it and why.