This biscuit is designed as a snack, not as a meal. It works as a practical option between meals, after training, on the go, or when you want a dessert that adds protein and fiber instead of mostly sugar and flour. That means it fits well into situations where you need something portable and sweet, but you are not trying to replace a full breakfast, lunch or dinner.
After training, a protein-containing snack can be a convenient way to add protein to your day, but it is not a substitute for a proper post-workout meal if your goal is complete nutrition. The biscuit also provides fiber and a moderate amount of sweet satisfaction, which can make it a useful afternoon snack with coffee or tea. People often choose it for the office, travel or a gym bag because it comes in a 50 g portion that is easy to take with you.
If you are trying to lower your intake of added sugar, the sweetness here comes from sucralose instead of added sugar. However, this is still a sweet food, and it contains a source of energy like any biscuit, so it is part of the sweet snack category rather than the base of your diet. It fits best when included as one part of an active lifestyle, not as the foundation of your diet.