Google Reindexing on a daily basis?

[Haltos]

As an online business development professional, I find Google's reindexing of web pages on a daily basis rather confusing. Yahoo is far easier to understand and maintain a ranking than Google.

When analysing top positioned web pages, keyword density, links etc. the results vary dramatically. Some no. 1 sites on a single word search have no text, no meta tags, low keyword density and so on.

My question is: Does PageRank matter anymore and does Google reindex on a daily basis rather than a monthly? And if so, what actually carries the greatest weight within Google's search engine algorithm?

[cbp]

Does PageRank matter anymore

It never has really mattered much - it has only ever been part of the ranking formula.

and does Google reindex on a daily basis rather than a monthly?

Google has been updating on a continuious basis for the last 8-9 (?) months.

And if so, what actually carries the greatest weight within Google's search engine algorithm?

Keyword(s) in the anchor text of incoming links rules.

CBP