c8636135___mdash__Free_Internet_Traffic_uration___Evolution_of_the_Web_Web_1_0
[Web 2.0] Backlinks [Web 3.0] Pay only for value [Web 1.0] 
Ecommerce
S p a m
S E O
S u b m i s s i o n
D o o r w a y
P a g e s
E c o m m e r c e
Harnessing Social Media &mdash; Web 2.0 Grows Up &mdash; Free Internet Traffic
Web 1.0