Why are pages missing from the index blog search engine?

Not a blog or a site that used to be in the front position SERP (search engine result page) down to a low position or even go away because erased. I myself have experienced not only in Google but in Yahoo, Live and MSN. With the loss of our blog on the front page of the search is very harmful. Because of unique visitors mendaptkan hope will be lost. Each search engine has their own policies that sometimes the policy could change rapidly. They always argued that this was to really - really customize the keywords to what a user is searching. So users will get what they want. Google has more than 200 algorithms to determine the highest position in their SERP. There are some who express them and most are still a mystery.

With the abolition of blogs on the highest position in the SERP as well as hope and challenge for us all. If we do not have a blog or site in the highest position it hopes to occupy high positions remain open. Or conversely, if the blogs we were in the highest position we have to work hard to maintain that is by improving the quality of the blog itself. One way to find out is to always view statistics on visitors such as how long they visited, what keywords they use, from where they are, how many pages they go to etc.. Lots of free tools that include Google Analytics. Seeing this phenomenon makes me more interested in seriously studying SEO techniques. Currently I have a site that was in the forefront in the Google SERP, with the number of visitors 700 to 1000. One advantage of the visitors coming from search engines is my Adsesnse business kliknya value is much higher than if it came from another site or typing the URL directly.

One big loss if the blog or removed from our site is search engine visitors who we hope will decrease. Once I find the source of our blog or website lost even deleted from the search engines are:

• The number of users who hit back button or close it immediately. If this happens, then search engine will assume that what is sought by a user who typed keywords irrelevant. If the percentage of the user pressing the back button or close the very large blog pages more than 80% then the blog will be placed in a low position SERP.
• When a very short visit even less than 1 minute. The relevance of the keyword is considered close to what the user searched if the time after finding that old blog. The longer visitors rating the better blogs on search engines.
• Visitors are not doing any action. Actions include making a purchase, fill out the form, make comments, follow the mailing lists, download the page or image, etc.. The more action the user performed, the better and it is important blogs.
• Only visit a page and do not visit the other pages.
• No visit the blog at a later time. If the blog will attract the visitors to bookmark or visit at a later time by typing the URL directly.
• Blogs that are not found, a lot of errors or missing. It could be because of change of address, hit hack, etc. are improved. If this happens then within a fast search engine will remove from their index.
• Page blog that is never updated. Update blog page at least once a month.

These are some important factors that determine blog can survive in the highest position in the SERP. By considering the important factors above, then we will be able to maintain blogs on the highest position SERP. Hopefully some of this review can be useful for us all. Thank you.