This refers to what type of exercise you perform like weight lifting, aerobics, rock climbing, and so on. Now that you are sure you are healthy enough to exercise, decided if you need a personal trainer, stopped making excuses for having enough time, etc., and learned some key principles of exercise, you can make some goals. Don't set yourself up to fail. Losing thirty pounds in one month is unrealistic and unsafe. Although your weight may not be going down that much, you could be losing inches.
Muscle weighs more than fat and burns more calories as well.
You shouldn't put all the emphasis on weight anyways. Whether you are going to work out in a gym or at home, measure your bodyparts and use that as a baseline for progress. Measure your chest, arms, waist, hips, and thighs. Some good goals would be to be able to increase your time on the treadmill by ten minutes or lose one inch in one month. Write down your goals to keep a record of them.