Google sitemaps totally bring us something good ?

[fianliao]

Google sitemaps limits the huge waste of the resources needed to crawl web site that have not changed. The technology allows webmasters to inform Google which pages have changed or if there are new content added to a website and then direct Google’s spiders directly to those pertinent pages. But i was wondering that Google sitemaps totally bring us something good ?

[Irene9001]

But i was wondering that Google sitemaps totally bring us something good ?

I think it doesn't bring anything good. And if it bring something good then it might be an accidental effect.