What is a feed?
Feed is a means for users to read the entries of a website or part of them. The feed is a file that contains the information of the blog content and that is updated automatically.
This means that when you are interested in a blog you can subscribe to your feed and this way you will know when there is a new content, you can also read it from your feed reader.
What are the advantages of using feeds?
Surely you wonder if there is an advantage to subscribing to a feed, and the answer is yes; Suppose you like 50 blogs and read them regularly, can you imagine having to be entering these 50 blogs every time you want to know if they have written something new? You could lose a lot of valuable time, but if you subscribe to the feed of those blogs you will know when there is a new entry. In some of them without having to enter each one of them.