Pure Chakra Is Used in Jutsu Such as The Rasengan.
its part of Shape Transformation.
Its Highly Importand for alot of Jutsu.
Elemental Chakra
Elemental Chakra is Pure chakra But With a Changed affinity.
For Things Such as Suiton,Katon,Fuuton,Raiton,Doton.
Its Part of Nature Transformation.
For a Succesfull Elemental Chakra Attack,You Need Both Nature Transformation and Shape Transformation.
Nature Transformation
Nature Transformation is Advanced Chakra Controll.
The User can Mold his chakra Into a Diffrent Affinity.
Altough this Requires Good Chakra Control.
Nature transformation is one of two necessary techniques for creating a technique, its counterpart being shape transformation.
Few shinobi can use both shape manipulation and nature manipulation.
This is Used in Many Things.
Mostly The Basic 5 Elements.
Water,Fire,Wind,Lightning,Earth.
In general, every person has chakra that has an affinity towards one of these types, a characteristic that seems to be genetic, since whole clans sometimes share the same affinity. Most members of the Uchiha clan, for example, had an affinity towards the Fire nature.Besides the five basic nature types, there are several more advanced types. By initiating more than one basic chakra nature transformation simultaneously, one can create a completely new nature of chakra with unique properties. Doing this requires a special ability and such abilities are rarely seen outside a kekkei genkai or kekkei tōta. In the anime, it is stated that those with the ability to utilise advanced natures possess an affinity for the chakra natures they must simultaneously activate.