I am doing SEO for my website is: http://quyenphuongblackberry.vn with the keyword: blackberry. At first it is developing very well and have stood on page 2. But recent days it just fell down, down to page 3 and page 5. Does my site have been no sandbox? How do I develop next site now: (. Check on Google for the keyword index is still good: http://www.google.com.vn/#sclient=p....,cf.osb&fp=66bddd8304f4d39b&biw=1152&bih=699
If your site has gradually dropped it is generally due to two things: - you stopped doing something you were previously doing - you stopped working on your SEO and the competition overtook you It doesnt sound like a sandbox issue as they would have started you so high, and I wouldnt look to start blaming Google as these things are generally due to something you have started, or stopped doing. And dont worry about developed a 'next site' you are far better off working with what you have and improving that. Benchmark your self against your competition and work out the areas you need to improve.
The most possible reasons (that I can figure out) are, - Some sort of penalty - Rising competition - Holiday season