I'm going to break it down into very simple methods with easy to follow instructions that actually work!

What is DNS server: https://en.wikipedia.org/wiki/Name_server

Q:Is there any advantages in changing DNS servers other than gaining more performance?
A: yes, more Security[www.makeuseof.com].

This part of the guide shows you how to change your DNS servers to the Cloudflare's[www.cloudflare.com]. now take a look at the image below

*the first row belongs to Cloudflare



This is the map of Cloudflare CDNs locations across the globe:
https://www.cloudflare.com/network/

And here is the official list of Google CDNs across the globe: https://cloud.google.com/cdn/docs/locations

as you can see, Cloudflare has got a lot more servers than Google does so no matter which part of the world you are, Cloudflare can give you faster DNS responses than other DNS servers. Cloudflare runs one of the largest authoritative DNS networks in the world.
Here's more info about this and how Cloudflare is the fastest DNS server in every continent: http://www.dnsperf.com/

• Step 1: Click on the Start menu, then click on Control Panel.
  
• Step 2: Click on Network and Internet.
  
• Step 3: Click on Change Adapter Settings.
  
• Step 4: Right click on the Wi-Fi network you are connected to.
  
• Step 5: Click Properties.
  
• Step 6: Select Internet Protocol Version 4.
  
• Step 7: Click Properties.
  
• Step 8: Click Use The Following DNS Server Addresses.
  
• Step 9: Remove any IP addresses that may be already listed and in their place add:

• Step 10: Click OK.
  
• Step 11: Go now to Internet Protocol Version 6.
  
• Step 12: Click Properties
  
• Step 13: Click Use The Following DNS Server Addresses.
  
• Step 14: Remove any IP addresses that may be already listed and in their place add:

• Step 15: Click Close.

Ubuntu

• Step 1: Click System > Preferences > Network Connections.
  
• Step 2: Click on the Wireless tab, then choose the Wi-Fi network you are currently connected to.
  
• Step 3: Click Edit then click IPv4.
  
• Step 4: Change the DNS servers listed to:

• Step 5: Click Apply
  
• Step 6: Then go to IPv6.
  
• Step 7: Add the DNS servers:

• Step 8: Click Apply.

• Step 1: In the command line, type:

• Step 2: Replace the nameserver lines with: (Since you are using vim press the i key on your keyboard to edit the document)

• For IPv4:

• For IPv6:

[code[nameserver 2606:4700:4700::1111
nameserver 2606:4700:4700::1001[/code]

• Step 3: Save and exit vim by pressing the ESC key on your keyboard. Then after lifting the key type :wq

Leatrix Latency Fix reduces your online gaming latency by increasing the frequency of TCP acknowledgements sent to the game server. For the technically minded, this is a program which will modify TCPAckFrequency.

System Requirements
Windows (64-bit or 32-bit, Vista SP1+, XP SP3).

Download Link[www.wowinterface.com]


Installation video:

Nowadays with advanced technologies it doesn't matter much if you're using Wireless or Wired Internet connection as long as you use the right equipment.

few things to keep in mind:
If your wireless router is in another room or another floor depending on the material used inside your walls or interference caused by other wireless devices around your area you will see a drop in your signal, so built in wireless adapters like in laptops or on PC motherboards with their small antennas won't do you any good.
the best Wireless network adapters available in the market for normal/pro users are these[www.alfa.com.tw]. they are powerful, they have features that are rarely found in consumer wireless network adapters and they got great penetrative ability and they come with detachable upgradeable antennas.

There are of course a dozen other ways to improve your connection performance but they either can decrease your security level or they're too trivial to be included in this guide. however I'll try to keep this updated once I get new ideas.

Write down any questions/suggestions about this guide in the comments.