RSS is designed to show selected data. With an RSS channel (RSS is often called a News feed or RSS feed) users can check your site faster using an RSS reading software (a site or program that gathers and sorts out RSS channels).
RSS Feed is a standalone PHP/MySQL based script which allows you to easily create unlimited amount of RSS channels. You can then add data items to any of the RSS channels at any time and your web site visitors can use your channels links to read these data items. When creating a new channel you can set different options – how many items to publish, sort order for items, length of each item data.