I have a website like Stackoverflow. I'm creating a sitemap for it. I want to know, what timestamp should be as the value of last-modified for a page? (a question and all its answers)
All I'm trying to understand is when exactly should I update the value of
lastmod in a question and answer website? When someone leaves a comment under an answer, should I update
lastmod of that page? When either the question or an answer is edited, should I update
I can update it every time after each minor change in the content of the page (a commend added/deleted, a answer added/deleted, either question of answer edited). But I'm worried about google, I'm not sure will google skip (not recrawl) us after a while because of our minor changes? Can google understand the content of the page is changed, probably a little bit, but anyway it is changed. Or it just cares about huge changes? And will ignore minor changes?