It stimulates the initial rooting since it reduces the compaction of the earth.
It is very easy to use. You only have to add a generous amount and mix it with the substrate before planting, regardless of its quality and if it already has perlite. For the price it has, it's not worth skimping.
You can improve the substrate by adding a preventative antiplagas / fungi, humus, trichoderma and for the drainage of arlita pots.