No a teraz som cital takuto verziu:
User searches for $search_terms using Google through a Microsoft toolbar.
User clicks a link from the results, ending up at site $site.
The toolbar tells Microsoft that a user looking for $search_terms ended up at $site.
Bing uses this to rank $site higher in searches for $search_terms.

a to mi teda pride celkom ok. Proste od svojich uzivatelov dostavaju response co by chceli vidiet, ked nieco hladaju.

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A tiez to moze byt uplna nahoda. Proste ludia zo stranky A chodia na stranku B, tak bing posunie vysledok B vyssie. Google ma omnoho vacsiu siet na trackovanie pohybu uzivatelov ako IE. Ci uz veela pouzivatelov chrome, nespocetne vela stranok s GA, alebo toto :)


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tl;dr - google robi to iste :)