the time when google update page rank or dance

[hoanghong]

dear freinds!

i have some site:
- cualuoichongmuoi.net.vn
- sango.info.vn
- maihiendidong.vn

with keys: cua luoi chong muoi, luoi chong muoi, mai hien di dong, san go cong nghiep, san go

sometime my site has good position, sometime it disappear off first google search result page.
arcoding to my some friend, i know that is the time when google dance.

the question is : how can we guess that time to prepare my workk better.

and i know google 'll update page rank per several month, can we guess the time when google update?

thank you very much!

[dubaidhow]

Google update PR after every months, so I think in next PR update may occur.

[ralphjenss]

Google does not ring a bell before an action I guess... I am surprised by recent update. Let me clear your points. Google dance is not like page rank. Google dance effects only those websites which have low site updates frequency. Google like regular updates from site owners. Secondly the cause of fluctuation in your keyword rankings may be the strategies you are using for link building. Content based strategies provide stability in your keywords SERPs. Update your site regularly will reduce this effect.

[NewDelhiSEO]

Google update PR after every months, so I think in next PR update may occur.

Don't say what you think, unless you are asked for an opinion.
Google PR update does not happen every month. It takes about 1-3 months to happen.

I have a simple advice. Do not guess. Do not wait till the last moment to improve your work.
Make sure what you know is RIGHT. Search, Re-Search and then cross check your findings with your peers and seniors.
You have got the whole concept of Google Dance all wrong inside your head. Clear it up.