RSS? How do I get content from a producer?

Hi,

I have agreed to take content from another company and they have suggested I take it via RSS. Some of the content will be updated monthly and I need notification of when it has been updated.

My problem is I haven’t the foggiest idea how I achieve this? Is there a plugin, or another method?

Comments, feedback, advice greatly appreciated.

Thanks

My website is https://www.whichinvest.com