Seo Automatic Sitemap Generation vs change freq vs priority
changefreq priority lastmod auto map generate
XML Site Map
Automatic Sitemap Generation (Days) - ()
never vs yearly vs monthly vs weekly vs daily vs hourly vs always



bulletin site map


Automatic Sitemap Generation (Days)


priority 1


sitemap ...



2009 lastmod
changefreq





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Priority & Change Frequency
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As Google has evolved the past few years, they have made a few important comments about how they prefer to handle Changefreq & Priority.XML tags in your Sitemap.XML file. In this 2015 Google Hangout webmaster chat, Googles John Muller commented on the decreasing importance of these two tags.
Essentially, Google highlighted that one of the more modern items to really pay attention to is the timestamp for any given page. This helps inform Google when a page was last updated. One of the biggest things Google seems to care about is ensuring that they are able to easily see when / how often content is updated, and that you are consistent in how you tell them that. The timestamp is a great way to do this.
For our purposes, we still feel that Changefreq & Sitemap.XML Priority settings are another important way to do that (especially for larger sites see the note below), provided you follow the best practices outlined in this post. And of course, in light of the new comments, keeping the timestamp updated for new changes will now be of utmost importance as well.
Here is the full Q&A from Google:

Does priority and frequency matter in a sitemap?
If not, how can we tell Google to crawl specific pages on daily or high priority?
Priority and change frequency doesnt really play that much of a role with Sitemaps anymore.
This is something where weve tried various things but essentially, if you have a sitemap file and you are using it to tell us about the pages that were changed or updated, it is much better to just specify the time stamp directly so that we can look into our internal systems and say we havent crawled since this date therefore we should crawl again.
And just crawling daily doesnt make much sense if your content doesnt change. So that is something where we see a lot of sites they give us this information in the sitemap, they said it changes daily or weekly, and we look in our database and it hasnt changed in a month or years
So what Id really recommend is using the timestamp.