I have just update the look and content of a website, which has re-set the PR to 0. Traffic from keywords has always been 0 as we do not feature in top 100 for any words. How often does google update keyword positions?
The PR is updated a few times a year. The position in the search results page is updated as an ongoing process.
Every day or all the time. You site may not be revisited every day, but is continuously updating it database. You keyword position may change at any moment.
When everyone says you need to get backlinks, how many backlinks are necessary? Is there a number? 10? 100? 1000? Also, are too many considered spam? Thanks....