Feeds are simple in WordPress. Take the root URL of a page or posts by category and in the address bar add /feed/ to the end of the address
to see the feed it becomes
so for a category we might have
or a tag
It is the feed address we use to generate newsletters in Mailchimp.
Feed settings are set in the Reading section of Settings
Here we can ensure that there are enough items in the feed to feed MailChimp in the Syndication feeds show the most recent
and ensure that For each article in a feed, show Full text