1. Communication
1.1. Examples
1.1.1. Weibo
1.1.2. Twitter
1.1.3. Whatsapp
1.1.4. Facebook
1.2. Advantages
1.2.1. More convenient to connect with others
1.2.1.1. Especially communicating with people from abroad
1.2.2. Multiple communication ways
1.2.2.1. For instance, making good use of photos and icons
1.2.3. Have more fun with connecting the others
1.2.4. Encourage people to build up relationship
1.2.4.1. broaden the social circle
1.3. Disadvantages
1.3.1. Weaken peoples' communication skills
1.3.2. May lead some crime
2. Information
2.1. Examples
2.1.1. Google maps
2.1.2. Dictionary
2.1.3. E-book
2.1.4. Wikipedia
2.2. Benefits
2.2.1. More environmentally-friendly
2.2.2. Can act as a good and useful learning tool
2.2.3. Saving money(cost) For example, reading online newspaper can save the cost of purchasing newspaper
2.3. Costs
2.3.1. The accuracy of information is doubtful, for instance, Wikipedia.
3. Entertainment
3.1. Examples
3.1.1. Games
3.1.1.1. Angry birds
3.1.1.2. Mushroom garden
3.1.2. Instagrams
3.1.3. Videos
3.1.3.1. Youtube
3.2. Advantages
3.2.1. Great ways for relax
3.3. Disadvantages
3.3.1. Likely to get addicted towards these entertainment, which will adversely affect academic results, career and interpersonal relationship