What are navparams in ionic

What are navparams in ionic.
I was going through this article.https://www.freakyjolly.com/ionic-4-how-to-use-ionic-modal-popovers-and-pass-data-and-receive-response/ .But i couldnt understand how navparams work.Can you please explain it to me.

navParams are a service facility to allow you to pass data backwards and forwards between popovers and modals.

My answer to this question (although it may be controversial) is “a vestige of an earlier time that is best left forgotten”. I don’t think there remains anything in Ionic-land for which NavParams is the best choice to employ.