Count Backlinks from Unique Domains Using Yahoo Inbound Links API

In two introductory article series on the Yahoo Site Explorer Inbound Links API, you learned the very basic steps involved in connecting to the Yahoo Inbound Links API using the PHP server side scripting language to get important link- related data.

Those were very basic concepts which you need to know to build more complex applications. In this series, you will learn how to build a web application using Yahoo Site Explorer's inbound links API to count back links/inbound links from unique domains. The first part will discuss the design and concept of the implementation. The second and third parts will discuss the PHP script and application in detail.

These are very important tools for search engine optimization and web marketing. In a study conducted by SEOMoz, “diversity of link sources” (links from many unique root domains) is considered to be one of the top five primary ranking factors Google considered in 2009.

Source: http://www.seomoz.org/article/search-ranking-factors

Because of this trend, it is important for web marketing analysts and SEO professionals to at least examine the back link profile of their domains and see how many links are coming from unique domains. This information can be used as input to formulate strategies pertaining to link popularity improvement.