what does 'Priority' mean with sitemaps? also do you think it is good to manually alter the change frequencies for all your pages? Does this stuff matter that much? thanks
Hello Friend, Recently i found that if you submit you site map with google webmaster tools your site link and your all page which google make cache will remove and google forget your site link and if you resubmit it. google crawler visit you site mape long time and make all site link cache. if you want more site link cache please not submitted your site mape in google webmaster tools. Thanks.
priority will tell to crawler that which page it need to give priority for indexing. yes you can change frequency manually no prob in it.