Professional Search Engine Optimisation companies have teams of experienced members to work on projects. They set up strategy to boost up the ranking and to solve the problems that could occur in future. If you hire your SEO team, they will not be as experts as that of agencies. So, absence of experts or bad decisions could adversely affect ranking. Hire an SEO agency to avoid risks. Webnovators provides the best SEO services in Australia.
What is Pligg?

Pligg is an open source content management system that lets you easily create your own user-powered website.