writing competion i like it : )

I won't dive deep into how the world work on this one, i will only cite two examples but really important ones.
Youtube, yes i choose to search TATU Not gonna get us but the 20 following songs were just a playlist choose by youtube, and each time i get on the youtube home screen i can "choose" what to watch but choose in a pool of different videos that have been tested to know which one was making the most clicks in the end maybe youtube already knew on what i was about to click.
Another small yet efficient exemple was instagram, i was just looking at my friends and then it apeard pretty clearly but i don't choose which stories i watch with the most attention Instagram does for me by putting the stories from the people in interact the most at the begining and the other stories at the end which make me more likely to watch all the stories. In the end this open the question of what do we really choose to see and what is choosen for us ? We can't know it's not physically infront of us we have to close our eyes and trust the system.