First off, it is impossible to “spot reduce”, that is to lose fat from a specific area. When you do exercises that target a specific area, you’re actually targeting the muscles (not fat!) in that area. That means you’re doing step 2, which is increasing the shape and firmness of your arms by toning your arm muscles. That will get you some results, but fighting jiggly arms requires more than just spot exercises!
If you want to lose weight and keep it off, you know that exercise should be an essential part of your routine. But the benefits of physical activity go far beyond just physical fitness. Increasingly, more and more research is showing that working out regularly can boost other aspects of your health as well, including cognitive function and emotional well-being.