Two most important effects of social media on teenagers are low academic achievement and health problems. The first one is that social media addicts may display poor academic performance in school. Teenagers who use social media excessively do not have adequate time to fulfill their assignments because they cannot get away from their electronic gadgets, such as mobile phones and tablets, which enable them to use social platforms. Moreover, they can prefer to spend their time on social networking websites, such as Instagram and Twitter, instead of listening to their teacher in the classroom. Due to loss of focus on lessons, they get low grades in exams. As a result of social media addiction, they may encounter educational failure. The second effect of social media on teenagers is that excessive use of social media leads to health problems. Teenagers who use social media too much go to bed late, and thus they cannot get enough sleep. Furthermore, if they persist in this way of life, they may face sleep problems, such as insomnia and sleep deprivation, which adversely affect their energy. For this reason, they are inclined to be impatient with their family or friends. Consequently, they can lose contact with people around them because of negative attitudes towards the social circle. In brief, using social media is responsible for academic underachievement and health issues. 
Two most  
important
 effects of  
social
  media
 on  
teenagers
 are low academic achievement and health problems. The  
first
 one is that  
social
  media
 addicts may display poor academic performance in school.  
Teenagers
 who  
use
  social
  media
  excessively
 do not have adequate time to fulfill their assignments  
because
 they cannot  
get
 away from their electronic gadgets, such as mobile phones and tablets, which enable them to  
use
  social
 platforms.  
Moreover
, they can prefer to spend their time on  
social
 networking websites, such as Instagram and Twitter,  
instead
 of listening to their teacher in the classroom. Due to loss of focus on lessons, they  
get
 low grades in exams.  
As a result
 of  
social
  media
 addiction, they may encounter educational failure. The second effect of  
social
  media
 on  
teenagers
 is that excessive  
use
 of  
social
  media
 leads to health problems.  
Teenagers
 who  
use
  social
  media
 too much go to bed late, and  
thus
 they cannot  
get
  enough
 sleep.  
Furthermore
, if they persist in this way of life, they may face sleep problems, such as insomnia and sleep deprivation, which  
adversely
 affect their energy.  
For this reason
, they  
are inclined
 to be impatient with their family or friends.  
Consequently
, they can lose contact with  
people
 around them  
because
 of  
negative
 attitudes towards the  
social
 circle.  
In brief
, using  
social
  media
 is responsible for academic underachievement and health issues.