When confronted with media today (especially Social Media), it will help you to understand that YOU are the product being marketed, and then act accordingly.
Every secret, every action, every link that can be made to tie you to products and services will be exploited to the fullest. Every item of personal content is another check in someone's box to define how to sell you something. Further, every link put out there is also useful to others in identifying you, no matter how anonymous you desire to be.
Think about it.