I have a mobile phone niche website. I have a comparison section in that website in which the products are displayed from feed. I have two questions to ask
1. I already have a xml sitemap for my site. Should I have another sitemap for the compare section separately?
2. As I have mentioned earlier, products in the compare section are displayed from feed. When the feed is run, some products go off, replaced by new products. So the url of the old products goes to '404 page'. So, lot of 404 pages are getting added in the site. Please give me a good solution for this.
Looking forward for your expert advice.