What is RSS feed?

What is RSS feed? As what I have known the term RSS is refer to "Really Simple Syndication", and generally it is used to refer to web feeds, and the RSS document is called a "web feed or channel" includes full or summarized text, plus metadata such as publishing dates and authorship, the reader can easily subscribe to get their favorite websites with interesting topics and updated contents on it and aggregate feeds from many sites into one place. The RSS feed is consisting of software called RSS reader, feed reader, or aggregator which can be web-based or desktop-based. You, the user can subscribe to a feed by having feed's URL from a certain web into the reader or you can do it by clicking an RSS icon in a browser that initiates the subscription process. Indeed, the RSS reader simply checks the user's subscribed feeds regularly for new work or post and read the feeds.

RSS still crawled and archived even the deleted posts, and one thing I have learned don't delete your posts, instead put it in the draft of your blog.