RSS stands for "really simple syndication" or even "rich site summary". Basically, RSS feeds are text files with basic updated information from various online sources, including journals. The stripped down content is usually plugged into what used to be called a "feed reader" that could present the content in a way that made it readable and accessible. The content automatically updates so you'll have the latest information. One popular feed reader (that does still exist after the great feed reader extinction) is Feedly: https://feedly.com/i/welcome
For a much more detailed description of what RSS feeds are and why you might want to use them (and links to other feed readers), check out this site: https://www.lifewire.com/rss-101-3482781
I've added feeds for key anesthesiology for your convenience below, but feel free to use a reader and customize your own feeds.