Blogs (like this), news, social networks, internet chat-rooms, online gaming, marketplace, job search, grocery shopping, photo-editing, Skype, meetings, the list of convenience it has brought to our lives is inexhaustible.
Yet, mention WWW and people would think "vices" as well. After all, the world wide web is free for all - people of all ages, race or religion..as long as you have a computer and internet access that is. We have long heard of the easy access to pornography, the dangers of the internet chat-room, people dying from gaming day and night without food or sleep, another endless list that comes with the boon of the internet.
However, putting good and bad aside, the internet has definitely brought globalisation to a whole new level! World Wide Web as the name suggests has almost erased all national boundaries and most importantly brought about cultural imperialism.
Just take a look at the youtube (another one of those famous www inventions!) video above. I know you must be laughing, but in your opinion, do you think such behaviour would have been laughed at generations before us? Yes, an example of cultural imperialism is as such. The kind of information that the youths are being exposed to inadvertently effects the culture of our generation today. From our lifestyles to our beliefs, we have been largely influenced especially by the West. (Think Hollywood fashion trends and how premarital sex is glorified in MTVs.) Slowly we do see the youths of today are moving away from the jaded traditions of our elders to embrace such cultures.
Then there's also the people who swoon over the Japanese culture. This would never have been encouraged in the past (especially thanks to WWII in Singapore!). The availibility of Jap anime and being able to travel around the world without having to leave our seats has just contributed to this craze. Examples of the jap culture seen in Singapore would be Cosplay, japanese fasion and a rather large number of students taking up the Japanese language, just to name a few.

Cultural Imperialism usually happens because the more countries like the US have a vast mass media market that penetrates even the WWW thus dominating the scene of the media market. Whether this phonomena is good or bad, it really depends.