ISP provided DNS servers aren’t always the best as they may lead to speed and reliability issues, such as some websites not opening or taking too long to load. Your Internet service provider (ISP) issues a DNS server to you by default. Why would I want to change my DNS server? There are a number of reasons for doing this, and the process itself is very simple. To convert these numbers into addresses, your browser relies on a DNS Server, and although this will be set up by default, you can also change the DNS Server that you're using. If not for DNS, website names would look something like 93.184.16.12 instead of

Simple put, it's a system that converts site addresses from machine-friendly numbers, into human-friendly names. DNS (Domain Name System) sounds like a scary abbreviation for something that’s actually very simple to understand.