Some online websites which creates sitemaps online for others asking how frequently i want to change my sitemap? What does it mean ? shall i choose some option like daliy monthy or dynamic site maps are not recommended ? Or how it is?
It's how often you expect the given page content to change. Search engines that read XML sitemaps use this info as help in determining how often to crawl that page compared to other pages in your website.
Depends what you are working with . For instance if you have a CMS such as WordPress or Drupal there are ready-made plug-ins available that can help to generate your sitemap automatically
I logged in to Google sitemaps for the first time in a long time this morning and they have changed it quite a bit! More information on crawl statistics, top search queries, pagerank distribution, etc.