They can help you communicate with friends, relatives and other contacts.
To improve your knowledge
To communicate other people
To get information
Entertainment
Help students to their assignments
It promote awareness
They can help you organize your data and information.
They may help your work to be a lot easier.
It saves your time.
Disadvantages
They can have negative effects on your social life and interactions with other people if you do not maintain the balance between time online and offline.
They may distract students from their studies.
Too much time in front of monitor may adversely affect your eyesight.
Sitting in front of a computer for too long without exercise can cause a weight gain and other health issues.
Another disadvantage of personal computers is that they are addictive.
It cannot correct wrong instructions by itself.
Computers can make the mind lazy. You get used to not reading a book, or researching something at the library. Just a few key-strokes and you have your answer.