NEWBIE - WHY DO I NEED PROXIES FOR GSA ?

Can you please explain why ?  and how to set up correctly ? thanks 

Proxies are needed for:

a) stay anonymous and avoid complains from ISP or VPS hoster

b) increase speed when parsing search engines (else you can only do one query and need to wait for the next). With proxies you can do a lot queries at the same time as you have more than one outgoing IP.

thanks .........

You will probably need to update proxies often than we used to do because of the big G.