PPG-75 is the acronym for "polypropylene glycol", the polymer of propylene glycol (1,2-propanediol), a dihydric alcohol. The number after "PPG" indicates the average number of propylene glycol molecular units, for "PPG-75" it is 75 propylene glycol molecular units.
"PEG" means "polyethylene glycol", a polymer (macromolecule of low-molecular monomers - basic building blocks) of ethylene oxide (-CH2-CH2-O-). The number 300 after "PEG-" indicates the average number of ethylene oxide units, here 300 molecular units. "coconut oil esters" refers to ester compounds from components of coconut oil.
PPG-75-PEG-300 hexylene glycol is used in cosmetic formulations. The mixture of substances acts as a viscosity regulator (increases or decreases the viscosity of cosmetic products).