Newsletters are long-haul engagement. They serve as check-ins with your subscribers, as well as offering generalised engagement points. Newsletters are a way of both driving and maintaining engagement – at worst they serve as a reminder of the relationship the recipient has with a brand, but usually, they do a lot more. Provide as many engagement points/links as you can within your newsletters, and you'll be surprised at what crops up!
This article is by far one of the most interesting and fun articles that I have read in a long time. I say fun because the points mentioned here are simple and easy to read. They are not long passages that speak a lot and tends to lose focus. On the contrary the points mentioned here were in short crisp sentences that did not bore me but made my read a pleasurable one. Thanks!