Answer: Yogurt is keto as long as you stick with full-fat, plain varieties
Yogurt is a good dairy keto option. It's low in carbs and high in fat.
Just be careful to avoid flavored yogurts or low-fat yogurts, as these often include non-keto ingredients or drive up the carb count substantially.
If you want an even better option for keto, try greek yogurt. With fewer carbs, higher fats and proteins, it has similar taste and makes it easier for you to achieve your keto macros.