I don’t understand something very basic about proxies – please help

Hi,

I don’t get all of this proxy thing, I will explain.

1. If I do many searches in google in a short period of time, my IP will get banned from doing further searches – thus I need a proxy – right ?

2. If I buy a proxy IP and do the same thing it then will ban my proxy – right ?

So why do I need a proxy ?  and how will it help me ?