A proxy server is to make it simple, a computer or a module which acts as an intermediary between your Web browser and the Internet. The proxy on the Web allow you to own a a new ip address and therefore to be anonymous during your surfing. I propose you through this post a good big list of free proxy.
In browsing the internet in the office, you certainly go through a local proxy which will be a function of security by filtering certain malicious software, a spammer by depriving you of certain web content by banning a number of domains (youtube.com, daylimotion.com, etc...), network monitoring since he wrote into its logs each of your outlets on the internet.
An "external" located on the Web proxy has the same strengths or shortcomings but I would like to especially emphasise the last point, read it aloud:
The proxy will write into its logs each of your actions on the internet!
So yes, total anonymity is often utopian because you understand that every owner of a proxy is subject to the laws of the country in which it resides. Let's take an example. Imagine that you are a black hat (a hacker who gave in to the dark force) and that you have to commit harm through a specific proxy. Authorities locate geographically the proxy ip and after seizure of the latter, they will analyze the logs and dénicheront your real ip. Suffice to say that you will end up with handcuffs between 4 walls with can be a gorilla who is more than 10 years. I let you imagine the disaster, poor you!
And even if I use a proxy to the other side of the planet?
Actually go through proxy remote and located in other countries outside the European union for example can save you time. Even if administrative exchanges (international mandate, etc.) between countries are long, perilous and expensive it is possible may be to find the damn log with your fucked up digitally written ip above. I let you imagine what it would be for 2 countries politically in cold ^^. You can use proxies to book more tickets on ticketmaster. Best ticketmaster proxies are here: https://www.youtube.com/watch?v=AkOOWZGkaUg
OK and if I pass by a proxy located in Japan and I go through another in Russia...? hum?
I say you have much too much imagination. But what imagination!
In conclusion, understand that if we want to meet you you will be. So use these proxy wisely to protect your anonymity because it is increasingly in danger