Que es el marketing?

https://www.youtube.com/watch?v=OB9FedWEmRE

https://www.youtube.com/watch?v=VXuY03-ps_Q

https://www.youtube.com/watch?v=4S3AQ29NdDs

https://www.youtube.com/watch?v=xhkKIgG6vsA

https://www.youtube.com/watch?v=IGVRc0fMiNs