The most important factor about link building is the relevancy of the websites. To get your link on the others page involves the process of link exchange or reciprocal link. This means they will put the link on their website in exchange for you doing the same. The more relevant the website is, the more beneficial it is otherwise non relevant website can have negative impact on your search engine ranking. If your site is related to garment then link exchange with cooking website is not going to be relevant. So it should be thought carefully Inbound links are necessary to increase link popularity and higher search engine rankings and traffic. The quality of an inbound link is considered on the basis of its page rank. It depends on your promotion strategy whether you need quality instances and back links then it is better to go for inbound links of higher page rank. On the other hand if you need more visitors to your website and main aim is link popularity then inbound link from page rank zero can also solve your purpose.
There are two types of link building one way and two way. In One Way there is link to your website with no back link or no reciprocal link. Two way involves a link to your website from an external source and a link from your website back to the external source. Link building is a time consuming and tedious process. Still it is one of the best SEO process for getting targeted hits from other websites. So it is an essential part of any search engine optimization campaign. This not only builds and increases links with other websites, it also enhances relationships of webmasters of different websites to achieve their web promotion goals in a collective manner.
The rate of Link exchange should be optimum. Some SEO experts prefer it not to be too fast as some search engines prefer the slow approach. But it’s a fact that search engine givers higher rank to those websites that have quality inbound links, consistent and relevant.
In conclusion, link building campaign can be successful on the basis of these factors. Choose the proper relevant website and then choose the most relevant category for link exchange. Then see the page rank considerations. If the aim is to increase traffic then even relevant website of page rank zero could meet your requirements. On the other hand if you need quality back links then you can for link exchange with higher page rank websites.