What effect does technology have on the humanbrain?

The brain by which people completely contral their body forms the central nervous system of the human body together with the nerva system .But the surprising fact is that the brain is being controlled by technology. For example; social media.Young and old. Everyone is immersed in social sites. If you want to do some work. You have enter social media . When the time passes, it is not understand, Suppoes you are watching a video, may be youtube or facebook the video you are watching . As soon as that video ends, another similar videos come automatically , then you start watching that video  . even if you don't need to , it is a bit like reading psychology . The technology understands what you are searching for and gives you suggestions accordingly . We have to be a little careful about the moral implications. A 2015 study in canada found that a subjects attentions span is 8 seconds on average. According to research, 15 years ago ,12 seconds could hold peoples attention, not only research but a 2012 survey of thousands of teachers in united states , the united kingdom and Puerto Rico says that school students are not able to hold attention for long . What heppened. In 15v years that the attentionly Span for the worlds citizens has deteriorate  so much? Technology is making our life much easier in the information age. Their is no doubt but no things should be overused . We much remember that all positive thinks have morals.