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What is Web 2.0 and what are the major site in Web 2.0? i want to know about web 1.0 and web 2.0

Hello everyone I have a fairly good idea about SEO theoretically and it's variable factors that affect traffic etc. I am yet to put it into practice because I 'know of' SEO but I don't 'know it'. Having said that, I was wondering about the following: "The ultimate goal for any online marketer...

Will anyone please tell me what are the broad differences between private and public proxies?! :confused: I know that we can use public proxies with tools like SB, etc But what help do private proxies provide?

Sorry for the noob question, I tried to google around and found different sites explaining the difference in how they work but I was wondering how it related to this kind of stuff specifically. Is there a difference with the sites monitoring traffic like will a VPN look more legitimate than...