Answers to simple Questions:

How do I add it to my scene?

Oke, but how do I add it to my Material?

Per Slider Documentation:

Surface

Color

Surface "Color" controls the color of reflections on the glass surface.

Roughness

Surface "Roughness" controls the roughness of reflections on the glass surface.

Index

Surface "Index" controls the index of refraction of the reflections on the glass surface.

Refraction

Color

Refraction "Color" controls the main color of the glass.

Roughness

Refraction "Roughness" controls the roughness of the refraction in the glass.

Dispersion

Refraction "Dispersion" controls dispersion or separation of color in the refraction in the glass.

Absorption Color

Refraction "Absorption Color" controls the color the glass will be absorbed into.

Absorption Strength

Refraction "Absorption Strength" controls the severity of the absorption. (0.000 is no absorption)

IOR

Refraction "IOR" controls the index of refraction of the refraction in the glass.

Caustics (I'm still not happy with the glass caustics, so this might update/change in the future)

Enable Caustics

Pretty straight forward, 1.000 enables caustics and 0.000 disables caustics.

Artifacts

Caustics "Artifacts" adds noise and artifact to the caustics to mimic glass imperfections. (subtle effect)

Strength

Caustics "Strength" controls the strength of the caustics.

Dispersion

Caustics "Dispersion" controls the dispersion or separation of colors by refraction.