What is Back-linking SEO and it's benefits ?
In the old days you may have received a lot of requests to have reciprocal linking from your website to another website. This no longer counts towards your Search Engine ranking.
It is a very difficult thing to go to a reputed company, preferably within your industry, and ask them to link through to your website without giving them anything in return, but this is now what will grant you a much higher rating within Google and the likes.
Basically think of back linking as votes. The more trusted people that vote for your website the higher your chances of winning are.
So go out there and smoosch people and get as many votes as you can.