so what are backlinks?
Backlink is a link from other websites to your website and its also called as Inbound link(IBL).
Reasons why backlinks is important for seo?
The reason behind that is to get the higher page rank(pr)
and help to improve your search engine results page(serp).
Why backlinks are useful?
It is useful to generate traffic.
Which type of backlinks?
It's not important that you have more backlinks but you should have good quality as well as quantity links.
here i explain you.When ever you are going to put backlinks remmember one thing.
Put the links on that websites which has good quality.The quality will be good if the content of that
website should be related to yours.Get more and more backlinks from your related content websites.Which
gets you increase in quantity.In search engine statergies this is one of the statergy that help you to
generate traffic and increased PR.
Here i suggest you some of the free backlinks analysis tools
free multiple backlink checker
free backlink checker tool