Google Sitemap for SEO?

Hello friends,

I just bought an xml-sitemaps and have question about Google sitemap for SEO.

How often should I run sitemap for new urls or pages?
Do I need to place the html sitemap on the homepage?


Have a nice day!

I’m not sure a product like this is all that useful now since google can crawl your site just like the sitemaps program but probably better.