and i update my site, how long does it take for google to recrawl it, and update it. Because i optimized the pages, and idk how long it will take for the pages to rank better.
I've seen content on busy forums being indexed and ranking in less than 1 hour, but it could take it several days for google to come back to your site, and other days to see results
Based on my experiences, Google updates once every couple of weeks, sometimes a few weeks. Page ranks aren't really as important as people think. Just make sure you have unique content. My biggest jump ever was 3 page ranks even with unique content, and that was a 2 week wait.