The bicep curl is the most popular isolation exercise for the bicep, you can perform the bicep curl with a lot of equipment, resistance bands, dumbbells or a barbell. There’s also a lot of gym machines that you’ll be able to use that target this particular muscle group.
This exercise is great if you want to achieve proportionately bigger biceps, however, bear in mind that the most healthy way of exercising is to keep your body in balance. So when performing the bicep curl make sure you spend the same amount of time (or greater) exercising your triceps.