Every time an article or a blog post is published, a webmaster waits for the searchbot to index the website and pull up the web page in the Search Engine Result Pages during a search. The time taken for a web page to rank in top 20 of Google SERPs depends on its various internal and external factors. The Internal factors depend on how well a web page has been optimized while the external factors depend on the competition for a particular key phrase.
from Internet and Businesses Online: SEO Articles from EzineArticles.com