Hii Pallavi!

Acetyl co-A is an enzyme known as Acetyl coenzyme A. It mainly takes part in Krebs cycle and also in various metabolic and biochemical reactions such as for proteins, lipids, carbohydrates etc.,  The main function of Acetyl co-A is to provide Acetyl group in Krebs cycle (citric acid cycle) for production of energy after its oxidisation.

Hope this helps.

Good luck!