The phrase "didactic purposes" refers to using something, such as a story or a lesson, with the intention of teaching or educating others. Full definition
It is a mistake to use the pulpit for what we might describe as didactic purposes, however important and necessary the task of teaching may be in other connections. (religion-online.org)
Paints, glues and other products for didactic purposes are also important sources of indoor pollution. (sciencedaily.com)
«It's easy to mock these radical life experiments as inauthentic, but Evans at least had a didactic purpose.» (rachelheldevans.com)