An integrated system means the ski and binding are designed as a matched pair with a proprietary connection interface, rather than using standard drilled mounts. Brands like Salomon and Rossignol engineer these setups so the binding works with the ski's flex pattern, which can deliver a smoother, more consistent feel underfoot.
The real advantage is convenience and performance right out of the box. The binding is optimized for that specific ski, and you won't need to pay a shop separately for a mount job. System packages are often a solid value for intermediate skiers who want a hassle-free setup that just works.
The downside is flexibility. You're locked into that brand's binding ecosystem, so replacing bindings later means sticking with compatible models only. You also can't swap in a different binding to experiment. If you like tweaking your setup or want more choices down the road, a traditional flat-mount binding is probably the better route.