Even this link helps to increase the PR of the site. So for any site having quality Inbound links is necessary. Inbound links are also the best way to increase traffic to your website. Link building focus more on insertion of link and Anchor text used.

Submit your site to various high PR directories. Search engine like Google prefer sites, which have a listing in DMOZ. So it is very important to submit site to DMOZ as well as many high PR directories.

Types of linking:

One way linking:

One way linking is basically when you are getting link without giving link to others. That means no outbound link.

Three way linking:

Three way linking is linking among three different websites which are relevant to each other.

Example:

Suppose there are three website http://www.abc.com, http://www.xyz.com, and http://www.123.com about SEO registered on different host.

Then,

Link Exchange:

It is also called two way linking or reciprocal linking. In this type of link building we get inbound link from one site only if we will provide them outbound link. That means there is exchange of link between two websites.

One way linking and three way linking are more beneficial than link exchange