I recently added a xml sitemap by generating it with online xml sitemap generator, There i found an option Priority, i selected it and now my sitemap shows something like this <priority>0.80</priority> , <priority>0.64</priority> for different page, please help me understand this .
Priority values are considered to be relative within your website, Valid priority values are: 0.0, 0.1, .......... 1.0 then most important page URL will have priority value: 1.0, rest of them as follows...