The Jargon File (version 4.4.7, 29 Dec 2003):

google juice
 n.

    A hypothetical substance which attracts the index bots of Google.com. In
    common usage, a web page or web site with high placement in the results of
    a particular search on Google or frequent placement in the results of a
    various searches is said to have ?a lot of google juice? or ?good google
    juice?. Also used to compare web pages or web sites, for example ?
    CrackMonkey has more google juice than KPMG?. See also juice, kilogoogle
    .