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So, lets say I have a list of 20 products on a page and I don't care what order they are displayed in. Would I gain any benefit of crawl/cache frequency by simply having the products ordered randomly on each page load? Would google still see the page as unchanged or would they view the content as changed and worthy of frequent crawling and caches. Is there a downside to giving google content arranged differently every time it crawls?
I know it probably won't help rankings, but if it increases crawl/cache frequency at least I know that when I make a meaningful change to the page that google is going to find it quick... rather than a month later.