What does Feed mean?

On Google Search Console it is now coming up with this……
Crawled – currently not indexed
Status: Excluded
https://www.railwayphotos.co.uk/railway-photo-or-art/feed/
https://www.railwayphotos.co.uk/search/{search_term_string}/feed/rss2/
https://www.railwayphotos.co.uk/how-to-photograph-steam-trains/feed/
https://www.railwayphotos.co.uk/comments/feed/
https://www.railwayphotos.co.uk/feed/…
What does Feed mean?

See original post by invalid@example.com (master-yoda)