Website Backlinks

Website Baklinks are
Seo Basic:
1. Why backlinks are important?
2. How to check backlinks?
3. How many websites link to you?

Definition:

A link is a citation or a 'Vote' for a website.

How to check Backlinks in Google.
go to www.google.com
write in serch bar, link:http://www.yoursitename.com
Press "Google Serch"
than you see something like this
Results 1 - 10 of about 39 linking to http://www.apniisp.com. (0.29 seconds)
here "39 linking to ........ your site, mean how many site are linking to this site.

Than in Yahoo to check your back link put this one on yahoo search bar.
linkdomain:www.yoursitename.com
here you see more detailed quaree about sitelink.