It is important for every webmaster to get his web pages indexed and get traffic from all major search engines especially Google. Search engines updates it records by indexing process, they send their robots to crawl the web, Some search engines bots might find it difficult to find all of your pages,depending on size of your web pages and the pages that are deeply buried.
That why sitemaps are submitted to search engines to help the search engines to find all of your pages and it does improve the chances of your whole site being indexed. Site map file is either created in XML,HTML or TXT format, Google sitemap must be created in XML, A Google sitemap is a way to let Google know about all the pages on your website.XML sitemap help bots to explore site structure, where as html site help is often used for site navigation purpose to help visitors to understand site hierarchy and structural layout. Google sitemap generator tool is an easiest way to generate a sitemap automatically. Having an updated sitemap will increases the chance of better indexing and search engine ranking.

It is being a  hot discussion  on many popular forums over last few months that google is working on new Search engine ranking algorithm and they are going to bring major changes in Search engine ranking algorithm to eliminate/reduce the effectiveness of  black hat SEO tricks that  bring  malicious and fake web pages appearing at the top of Google’s search results.
Google is indeed the world best and most trusted Search engine and to maintain its reputation,  people expect that google search will always generate only quality search results,
SO its a hard task for google to  work out  all such challenges in  case of failure Google  will lose trust of users and it can effect   Google leading role in coming years.
Although its a good news for users however  it can effect  SEO business if algo brings any major change.
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