- Relevance to your site
- Neighborhood it builds
- Backlinks to that site
Relevance - What keywords are you targeting? Are those keywords on the page you are requesting a backlink from? These are the questions you should be asking in order to build a quality link. The more relevant the page is to your site, the more a link from it will be worth to you.
Neighborhood - What other sites is the page linking to? Ideally, other links on the page from which you are requesting a link would be to sites exactly like yours. This will help put you in the right neighborhood as far as Google is concerned. If a page links to sites that resemble your site, Google will consider these sites to be related to yours and that is a good thing. If a page links to your site and a bunch of porn and gambling sites, Google will consider your site to be related to porn and gambling, which can have a dire effect on your results.
Backlinks to the page - How powerful is a page that you are looking for a link from? A page that has no backlinks is not near as powerful as a page that has hundreds of backlinks. If a page that has hundreds of backlinks links to your site, the power of those hundreds of links is also shared with you.
These are just a few basic things that should be observed when building links. More will be shared in later posts. Keep reading!