Having an ostomy pouch with a filter can help people who consistently find themselves with a lot of air in their pouches, or wake up with a “balloon” on their abdomen. The filter filters out the air without letting the odor from your inside your bag out too.
One problem many people run into when using a pouch with a filter, is the ostomy pouches are not perfect and tend to fail after a day or two for various. Filters often fail if loose stool clogs them or they get wet. As manufacturers release new ostomy pouches, their filters continue to improve, but there is still a lot of work to be done to achieve a fully functional built-in filter.
There is at least one company that makes a product to help with ballooning that has a lot of positive feedback and might be worth a try if you find yourself struggling with a lot of air in your pouch.