Google changes it's page ranking algorithm. it gives some points for your site's age. it also consider Your domain's age. This new trend for to keep the users of google with satisfication. If your seo work focus onlyto linkbuilding then it may not get good page rank. Google going to consider the users satisfaction on a page. it also give some point for positive reports of forum discussions. so check your domain age and more whois look up informations on greatstatistics dot com. Also we can analyze the competitors domain datails.... Be Prevent from lost of regular visitors of your site.
Hmmm...I doubt that Google uses user satisfaction within its actual algorithm, but it can effect your SEO in a round-about way. Basically, the better that you make a site for your users the better chance more people will use it and in turn link back to it.
Some tips that other webmasters have noticed include: If your site includes a lot of affiliate links, you might try reducing to only one or two links per page. If you're a distributor for another product, be sure that you don't simply copy and paste the product descriptions that you receive from the manufacturers. Google is looking for unique content, and if there are several distributor sites with the exact same product descriptions, there's no guarantee that yours is the site that will rank well. If you're selling affiliate products, the same suggestion applies. Be sure to write your own sales copy and provide additional, unique information. Don't spend too much time trying to stuff your keywords into your URL. If it works naturally, that's fine; but it appears as if this particular SEO technique has gone the way of the keyword meta tag. Make sure you site has plenty of high quality, unique content. Unique content is the key. If you're simply republishing other people's work, chances are you'll see a significant loss of traffic. And if you did get hit by the algorithm changes, don't let it get you down. Several very high-profile websites have noticed a significant decrease in search traffic, so at least you're in good company. Remember, Google makes over 400 changes to their algorithms every year, and most of them go virtually unnoticed.
With any slight algorithm changes (and they do change constantly) you're unlikely to notice any significant short term variation unless you were taking part in gray/black hat techniques which then get outlawed.
Do you mean decrease due to the site position on serp or due to fluctuation of rankings of sites where many sites will alternately go up and down.
Google is going to apply these changes from??? can i know about the Date? How much time it will take?