I'll agree with Josh Mendelsohn322 and William Chia305 and also add another opportunity I use to continue to promote features well beyond launch is to package them up with new and upcoming related features to continue to surface the great feature we launched a while back and also to tell a much greater story of the solution we offer...
For example, if we launch a new capability to automate an account set-up within our platform, then months go by and we launch a new feature that helps our customers QA the set-up of their account, then I would package the two and tell a story around how we help automate all facets of our customers journey, from account creation to quality assurance, at scale. So customers never forget the value we bring.