Link building is the SEO practice of obtaining links from external web sites to your own to improve both direct referrals ie. people clicking on the links and search engine ranking. Link building is all about increasing your site link popularity.
Web site Crawler will go to a site again and again whose ranking in Search Engine is high. You can verify this fact by putting your site on a high rank site. If your site link is available on a high rank web site then you have 99.99% chances that you site will be indexed with-in 24Hrs.
How to increase...