Protein is vital for the repair of muscle damage, helping maintain the immune system, helping to provide energy for the body, helping to manufacture hormones and enzymes and many more!
Protein also varies from complete to incomplete and some have a higher biological value(BV) than others. Regardless, the fact is we all need it.
Recommendations vary from (.3g – 1g) per pound of body weight. Athletes and people who strength train regularly need more than someone who leads a more sedentary lifestyle.
Try and consume some with each meal and have most of them come from whole food sources rather than powders if possible.