This means that what your Sims do will have a greater effect on their future.
Its main feature is that when Sims are in a certain emotion, they will build a “skill” based on that emotion, which enables Sims to randomly gain a Moodlet based on their past experiences. The Sims 4 Experiences Mod Pack is a revamped version of Affective combined with my abandoned Cradle-to-Grave mod.