Theme based links are sourced from High PR websites that serve relevant, authentic and niche content to its targeted users. All popular Search engines use link popularity in their ranking algorithms. Google uses it as its most important factor in ranking sites.

Developing and Maintaining Theme Based links are instrumental in enhancing search engine placements. Search engines check for genuineness of links built and thus it becomes imperative to build links over a period of time and continue to do so.

Over time it will become increasingly important to get links from the right community and not just to perform random link exchange.

Google and other commercial search engines usually list website in a timeframe of a few weeks to a month. During the initial stages it is a regular for your site to go into and out of their database many times until you have built up sufficient link popularity.

Google primarily focuses its algorithm on linkage data. On page criteria is weighted exceptionally lowly for shorter and highly competitive search phrases.