Skim through

What it does: emulsifying 

The science

PEG-150 pentaerythrityl tetrastearate functions as a viscosity-increasing aqueous agent.

Benefits for your hair

Promotes hair growth

As an emulsifying agent, this ingredient helps to thicken and stabilize products, making the application process smoother and easier.

TLDR 

PEG-150 pentaerythrityl tetrastearate is a great ingredient in products to improve the feel and application process.