My site can't automatically create a sitemap.So I create one by using an online sitemap generator.My question is should I create another sitemap later to overwrite it?
I think you should create sitemap and overwrite the previous one whenever you add new content or new pages.
You need to install a sitemap generator on your website, it will automatically generate a sitemap anytime there is a new post.
Good advice. Just write or use a script that updates the pages on your site automatically. I'm sure you can just find one also. Otherwise you can overwrite your sitemap file once in a while if you want. Sitemaps are over rated imo.
Hi I thinks the best solution is install site generate on your site, and it automatic update links to sitemap.xml when new contents has updated.
depend on what kind of CMS that u used, if you used Wordpress u can use sitemap generator plugin for easy to make sitemap for your site