The internet is expanding physically and virtually.
Physically the internet is expanding by humans with the thousands of new users on the internet each day.
Virtually the internet is expanding by those who develop new ways in which web pages are show and how requests are handled.
There is no way to tell because like the universe the internet is ever expanding.
Something that is growing continuously is known to be accrescent. "Social media on the Internet is accrescent and expanding exponentially."
This sounds as though you mean the universe, not the world. We believe that the universe has been expanding since the big bang. As to what it's expanding into, that's something of a non-question according to astronomers. If you look around on the internet you can get detailed explanations, including one by Zogg from Betelgeuse on Youtube.
E-commerce is expanding a business onto the internet where the can advertise to customers, sell their products or provide help services.
Susan Brooks and Bill Byles founded this by starting out small in 1997 and then expanding to the internet in the year 2000 and they are still available to this day. They are still able to help people to this day in 2013.
It is impossible to have a list of internet sites as there are constantly more websites being added and the Internet is every expanding. Just in the time answering this question alone, any 'list' would have been greatly altered by the changing internet sites, not to mention those sites who change names or relaunch.
Internet marketing conferences are beneficial for companies who are interested in expanding and improving their business online. These conferences allow companies to learn the latest information on software, technology and how to market their products online successfully.
The universe is expanding.
the opposite of expanding
The Earth isn't "expanding" into anything.
business partnership is expanding.\
It isn't expanding.