Many Sellers and buyers are new They do not know what this RSS. All of them have only one question in their mind. So let's solve this problem
RSS = Really Simple Syndication. And that's what it was created for. As a way of being able to access information in the most simplest, purest, rawest format possible. As a way for people to subscribe to their favorite websites latest posts and
everything else in their feed in a standardized way such as with a Feed Reader like the old Google Reader or or some other one like Feedly, NewsBlur, FeedBin, Inoreaderetc. These are all individual RSS feed subscriber apps but some feeds also let you subscribe in your browser and even by email notification etc so you don't have to use an RSS feed app.
Another benefit and reason for a website to have an RSS feed other than letting people subscribe to it in different ways is that it's also coded in a computer-readable format so that Search Engine bots/spiders/crawlers can access them and read them and then display them in their Search Results or as a way to find/crawl it's way around that site but Google only crawls so deep depending on the authority of your site anyway.