Paneer is an excellent source of protein for vegetarians and is made by curdling the milk with the help of lemon or vinegar and then draining the liquid. It is also a rich source of calcium and potassium. 100 gms of paneer contain approximately 18 gms of protein; but also has 21 gms of fat, amounting to a massive 265 calories.
Since the fat content is paneer is higher, there is also a chance of going on a calorie surplus (calorie intake more than the calorie expenditure) there by gaining weight. However, if administered in right quantities, paneer can fulfill your protein requirements and can be very helpful in your weight loss/fat loss journey.
Further, the fat in paneer is saturated fat which is widely debated to be unhealthy if consumed in large quantities, by many experts.