Which page should I make backlinks for?

Hi,guys!

I have a new site for about 1 months, and thanks to Google gave me a very good ranking.Several keywords in Top10.

I was puzzled with Google's SERPs,it changes every several days,for eg.
One of my keywords ranked at #9,and was page A,when I Update another page B,then the keyword still at #9 but the page changed to B...sometimes it was disappeared but it comeback after one or two days.

So, I want to know which page shuold i make backlinks?

any suggestions appreciated!

 

Build backlinks for both of them using targeted keywords as anchor text of each page.

 

I agree with Hersheys.

and

If you have a new site it happens often that you disappear from the SERPS and then come back.
By keeping building backlinks the SERPS will get more stable.

 

OK,I see..
Many thanks.

 

u have subdomains also? important to treat them as separate pages with google and build backlinks individually as well here...