My eCommerce site has pagination, So all items are spread over pages. 20 items on each page. Also the engine randomly shuffles items. So same item can be on page1 for one user and page10 for another user. Question: Is it a problem from Google's point of view. Since one day link to the item 1040 (for example) on page1.htm and another day it will be on page7.htm...... so it's going to be like links are always moving from page to page.... Thanks.
Its not a problem, accept that Google will only read the 20 that are on the page when they happen to index the page. Chances are a site map is going to be what you want to ensure every product gets searched every time your homepage does
Well, of course the page has pagination links so people can go through all pages. As well a GoogleBot can. So it should not be a problem for GoogleBot to know about all products. My only concern is that links to the product are shifting all the time and it might be hard for GoogleBot to figure out product's pages PageRank/TrustRank (what ever it is these days).